20402912 has 24 divisors (see below), whose sum is σ = 41150592. Its totient is φ = 9952000.

The previous prime is 20402897. The next prime is 20402927. The reversal of 20402912 is 21920402.

It is an interprime number because it is at equal distance from previous prime (20402897) and next prime (20402927).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6464 + ... + 9087.

It is an arithmetic number, because the mean of its divisors is an integer number (1714608).

Almost surely, 2^20402912 is an apocalyptic number.

It is an amenable number.

20402912 is an abundant number, since it is smaller than the sum of its proper divisors (20747680).

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

20402912 is a wasteful number, since it uses less digits than its factorization.

20402912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15602 (or 15594 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20402912 is about 4516.9582685697. The cubic root of 20402912 is about 273.2524421878.

The spelling of 20402912 in words is "twenty million, four hundred two thousand, nine hundred twelve".