20412856 has 8 divisors (see below), whose sum is σ = 38274120. Its totient is φ = 10206424.

The previous prime is 20412817. The next prime is 20412871. The reversal of 20412856 is 65821402.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a pancake number, because a pancake can be divided into 20412856 parts by 6389 straight cuts.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275796 + ... + 1275811.

It is an arithmetic number, because the mean of its divisors is an integer number (4784265).

Almost surely, 2^20412856 is an apocalyptic number.

It is an amenable number.

20412856 is a deficient number, since it is larger than the sum of its proper divisors (17861264).

20412856 is a wasteful number, since it uses less digits than its factorization.

20412856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551613 (or 2551609 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 20412856 is about 4518.0588752251. The cubic root of 20412856 is about 273.2968276978.

The spelling of 20412856 in words is "twenty million, four hundred twelve thousand, eight hundred fifty-six".