20872936 has 32 divisors (see below), whose sum is σ = 45823680. Its totient is φ = 8726400.

The previous prime is 20872933. The next prime is 20872939. The reversal of 20872936 is 63927802.

It is an interprime number because it is at equal distance from previous prime (20872933) and next prime (20872939).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20872895 and 20872904.

It is not an unprimeable number, because it can be changed into a prime (20872933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2250 + ... + 6841.

It is an arithmetic number, because the mean of its divisors is an integer number (1431990).

Almost surely, 2^20872936 is an apocalyptic number.

It is an amenable number.

20872936 is an abundant number, since it is smaller than the sum of its proper divisors (24950744).

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

20872936 is a wasteful number, since it uses less digits than its factorization.

20872936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9145 (or 9141 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20872936 is about 4568.6908409303. The cubic root of 20872936 is about 275.3348472122.

The spelling of 20872936 in words is "twenty million, eight hundred seventy-two thousand, nine hundred thirty-six".