31204009100 has 36 divisors (see below), whose sum is σ = 73868402328. Its totient is φ = 11346912000.

The previous prime is 31204009097. The next prime is 31204009139. The reversal of 31204009100 is 190040213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14182541 + ... + 14184740.

Almost surely, 2^31204009100 is an apocalyptic number.

It is an amenable number.

31204009100 is an abundant number, since it is smaller than the sum of its proper divisors (42664393228).

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

31204009100 is a wasteful number, since it uses less digits than its factorization.

31204009100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28367306 (or 28367299 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31204009100 its reverse (190040213), we get a palindrome (31394049313).

The spelling of 31204009100 in words is "thirty-one billion, two hundred four million, nine thousand, one hundred".