20323872 has 60 divisors (see below), whose sum is σ = 59779566. Its totient is φ = 6773760.

The previous prime is 20323871. The next prime is 20323909. The reversal of 20323872 is 27832302.

It can be written as a sum of positive squares in only one way, i.e., 18352656 + 1971216 = 4284^2 + 1404^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20323871) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1329 + ... + 6512.

Almost surely, 2^20323872 is an apocalyptic number.

It is an amenable number.

20323872 is an abundant number, since it is smaller than the sum of its proper divisors (39455694).

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

20323872 is an equidigital number, since it uses as much as digits as its factorization.

20323872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863 (or 7846 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20323872 is about 4508.2005279269. The cubic root of 20323872 is about 272.8991295013.

The spelling of 20323872 in words is "twenty million, three hundred twenty-three thousand, eight hundred seventy-two".