20972402 has 16 divisors (see below), whose sum is σ = 35157024. Its totient is φ = 9300000.

The previous prime is 20972383. The next prime is 20972417. The reversal of 20972402 is 20427902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10724 + ... + 12527.

It is an arithmetic number, because the mean of its divisors is an integer number (2197314).

Almost surely, 2^20972402 is an apocalyptic number.

20972402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20972402 is a deficient number, since it is larger than the sum of its proper divisors (14184622).

20972402 is a wasteful number, since it uses less digits than its factorization.

20972402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23305.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20972402 is about 4579.5635163190. The cubic root of 20972402 is about 275.7715062599.

The spelling of 20972402 in words is "twenty million, nine hundred seventy-two thousand, four hundred two".