20256836 has 24 divisors (see below), whose sum is σ = 37149504. Its totient is φ = 9646560.

The previous prime is 20256823. The next prime is 20256851. The reversal of 20256836 is 63865202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38471 + ... + 38993.

It is an arithmetic number, because the mean of its divisors is an integer number (1547896).

Almost surely, 2^20256836 is an apocalyptic number.

It is an amenable number.

20256836 is a deficient number, since it is larger than the sum of its proper divisors (16892668).

20256836 is a wasteful number, since it uses less digits than its factorization.

20256836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 969 counting only the distinct ones).

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

The square root of 20256836 is about 4500.7594914636. The cubic root of 20256836 is about 272.5987566751.

The spelling of 20256836 in words is "twenty million, two hundred fifty-six thousand, eight hundred thirty-six".