20907104 has 24 divisors (see below), whose sum is σ = 42039648. Its totient is φ = 10230400.

The previous prime is 20907091. The next prime is 20907137. The reversal of 20907104 is 40170902.

It is a self number, because there is not a number n which added to its sum of digits gives 20907104.

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, 5447 + ... + 8454.

It is an arithmetic number, because the mean of its divisors is an integer number (1751652).

Almost surely, 2^20907104 is an apocalyptic number.

It is an amenable number.

20907104 is an abundant number, since it is smaller than the sum of its proper divisors (21132544).

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

20907104 is a wasteful number, since it uses less digits than its factorization.

20907104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13958 (or 13950 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20907104 is about 4572.4286763163. The cubic root of 20907104 is about 275.4850019778.

The spelling of 20907104 in words is "twenty million, nine hundred seven thousand, one hundred four".