20971402 has 16 divisors (see below), whose sum is σ = 33611040. Its totient is φ = 9784368.

The previous prime is 20971381. The next prime is 20971403. The reversal of 20971402 is 20417902.

It is not an unprimeable number, because it can be changed into a prime (20971403) 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, 1573 + ... + 6664.

It is an arithmetic number, because the mean of its divisors is an integer number (2100690).

Almost surely, 2^20971402 is an apocalyptic number.

20971402 is a deficient number, since it is larger than the sum of its proper divisors (12639638).

20971402 is a wasteful number, since it uses less digits than its factorization.

20971402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20971402 is about 4579.4543343067. The cubic root of 20971402 is about 275.7671231045.

The spelling of 20971402 in words is "twenty million, nine hundred seventy-one thousand, four hundred two".