20372868 has 36 divisors (see below), whose sum is σ = 54529020. Its totient is φ = 6391296.

The previous prime is 20372843. The next prime is 20372873. The reversal of 20372868 is 86827302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7064964 + 13307904 = 2658^2 + 3648^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

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, 16033 + ... + 17256.

It is an arithmetic number, because the mean of its divisors is an integer number (1514695).

Almost surely, 2^20372868 is an apocalyptic number.

It is an amenable number.

20372868 is an abundant number, since it is smaller than the sum of its proper divisors (34156152).

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

20372868 is a wasteful number, since it uses less digits than its factorization.

20372868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33316 (or 33311 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 20372868 is about 4513.6313540208. The cubic root of 20372868 is about 273.1182517136.

The spelling of 20372868 in words is "twenty million, three hundred seventy-two thousand, eight hundred sixty-eight".