20492456 has 16 divisors (see below), whose sum is σ = 39361140. Its totient is φ = 9996160.

The previous prime is 20492447. The next prime is 20492477. The reversal of 20492456 is 65429402.

It can be written as a sum of positive squares in 2 ways, for example, as 16532356 + 3960100 = 4066^2 + 1990^2 .

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, 30911 + ... + 31566.

Almost surely, 2^20492456 is an apocalyptic number.

It is an amenable number.

20492456 is a deficient number, since it is larger than the sum of its proper divisors (18868684).

20492456 is a wasteful number, since it uses less digits than its factorization.

20492456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62524 (or 62520 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20492456 is about 4526.8593969771. The cubic root of 20492456 is about 273.6516075717.

The spelling of 20492456 in words is "twenty million, four hundred ninety-two thousand, four hundred fifty-six".