20922656 has 24 divisors (see below), whose sum is σ = 41377644. Its totient is φ = 10414080.

The previous prime is 20922647. The next prime is 20922677. The reversal of 20922656 is 65622902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 4243600 = 4084^2 + 2060^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6356 + ... + 9068.

Almost surely, 2^20922656 is an apocalyptic number.

It is an amenable number.

20922656 is a deficient number, since it is larger than the sum of its proper divisors (20454988).

20922656 is a wasteful number, since it uses less digits than its factorization.

20922656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964 (or 2956 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20922656 is about 4574.1289881244. The cubic root of 20922656 is about 275.5532926549.

The spelling of 20922656 in words is "twenty million, nine hundred twenty-two thousand, six hundred fifty-six".