20926872 has 48 divisors (see below), whose sum is σ = 59145840. Its totient is φ = 6671808.

The previous prime is 20926861. The next prime is 20926883. The reversal of 20926872 is 27862902.

It is an interprime number because it is at equal distance from previous prime (20926861) and next prime (20926883).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4663 + ... + 7974.

It is an arithmetic number, because the mean of its divisors is an integer number (1232205).

Almost surely, 2^20926872 is an apocalyptic number.

It is an amenable number.

20926872 is an abundant number, since it is smaller than the sum of its proper divisors (38218968).

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

20926872 is a wasteful number, since it uses less digits than its factorization.

20926872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12672 (or 12665 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20926872 is about 4574.5898176776. The cubic root of 20926872 is about 275.5717997804.

The spelling of 20926872 in words is "twenty million, nine hundred twenty-six thousand, eight hundred seventy-two".