20133320 has 32 divisors (see below), whose sum is σ = 45775800. Its totient is φ = 7968768.

The previous prime is 20133301. The next prime is 20133329. The reversal of 20133320 is 2333102.

It can be written as a sum of positive squares in 4 ways, for example, as 17960644 + 2172676 = 4238^2 + 1474^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20133295 and 20133304.

It is not an unprimeable number, because it can be changed into a prime (20133329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 6474.

Almost surely, 2^20133320 is an apocalyptic number.

20133320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20133320 is an abundant number, since it is smaller than the sum of its proper divisors (25642480).

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

20133320 is a wasteful number, since it uses less digits than its factorization.

20133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297 (or 5293 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20133320 is about 4487.0168263558. The cubic root of 20133320 is about 272.0435700100.

Adding to 20133320 its reverse (2333102), we get a palindrome (22466422).

The spelling of 20133320 in words is "twenty million, one hundred thirty-three thousand, three hundred twenty".