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33220020 = 2235553667
BaseRepresentation
bin111111010111…
…0010110110100
32022111202022010
41332232112310
532001020040
63144004220
7552236241
oct176562664
968452263
1033220020
111782a769
12b160670
136b61822
1445aa5c8
152db2e80
hex1fae5b4

33220020 has 24 divisors (see below), whose sum is σ = 93016224. Its totient is φ = 8858656.

The previous prime is 33220013. The next prime is 33220049. The reversal of 33220020 is 2002233.

It is a super-2 number, since 2×332200202 = 2207139457600800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 33219978 and 33220005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276774 + ... + 276893.

It is an arithmetic number, because the mean of its divisors is an integer number (3875676).

Almost surely, 233220020 is an apocalyptic number.

33220020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33220020 is an abundant number, since it is smaller than the sum of its proper divisors (59796204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33220020 is a wasteful number, since it uses less digits than its factorization.

33220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553679 (or 553677 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 33220020 is about 5763.6811153984. The cubic root of 33220020 is about 321.4647047915.

Adding to 33220020 its reverse (2002233), we get a palindrome (35222253).

The spelling of 33220020 in words is "thirty-three million, two hundred twenty thousand, twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 553667 1107334 1661001 2214668 2768335 3322002 5536670 6644004 8305005 11073340 16610010 33220020