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22020312 = 233917513
BaseRepresentation
bin101010000000…
…0000011011000
31112102202012010
41110000003120
521114122222
62103545520
7355112106
oct124000330
945382163
1022020312
1111480206
12745b2a0
13473cb92
142cd2c76
151dee80c
hex15000d8

22020312 has 16 divisors (see below), whose sum is σ = 55050840. Its totient is φ = 7340096.

The previous prime is 22020311. The next prime is 22020319. The reversal of 22020312 is 21302022.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458733 + ... + 458780.

Almost surely, 222020312 is an apocalyptic number.

It is an amenable number.

22020312 is an abundant number, since it is smaller than the sum of its proper divisors (33030528).

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

22020312 is a wasteful number, since it uses less digits than its factorization.

22020312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917522 (or 917518 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 22020312 is about 4692.5805267465. The cubic root of 22020312 is about 280.2901414229.

Adding to 22020312 its reverse (21302022), we get a palindrome (43322334).

The spelling of 22020312 in words is "twenty-two million, twenty thousand, three hundred twelve".

Divisors: 1 2 3 4 6 8 12 24 917513 1835026 2752539 3670052 5505078 7340104 11010156 22020312