31872234204 has 72 divisors (see below), whose sum is σ = 81833453520. Its totient is φ = 10457517312.

The previous prime is 31872234203. The next prime is 31872234217. The reversal of 31872234204 is 40243227813.

It is a happy number.

31872234204 is a `hidden beast` number, since 3 + 1 + 8 + 7 + 223 + 420 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31872234203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1325739 + ... + 1349565.

Almost surely, 2^31872234204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31872234204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40916726760).

31872234204 is an abundant number, since it is smaller than the sum of its proper divisors (49961219316).

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

31872234204 is a wasteful number, since it uses less digits than its factorization.

31872234204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24419 (or 24414 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 31872234204 in words is "thirty-one billion, eight hundred seventy-two million, two hundred thirty-four thousand, two hundred four".