20922012 has 36 divisors (see below), whose sum is σ = 53028976. Its totient is φ = 6955200.

The previous prime is 20921987. The next prime is 20922017. The reversal of 20922012 is 21022902.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20922012² = 875461172256288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20922017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21153 + ... + 22119.

Almost surely, 2^20922012 is an apocalyptic number.

It is an amenable number.

20922012 is an abundant number, since it is smaller than the sum of its proper divisors (32106964).

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

20922012 is a wasteful number, since it uses less digits than its factorization.

20922012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1573 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20922012 is about 4574.0585916667. The cubic root of 20922012 is about 275.5504654463.

Adding to 20922012 its reverse (21022902), we get a palindrome (41944914).

The spelling of 20922012 in words is "twenty million, nine hundred twenty-two thousand, twelve".