31200040020004 has 24 divisors (see below), whose sum is σ = 54652413106368. Its totient is φ = 15585070032480.

The previous prime is 31200040019983. The next prime is 31200040020131. The reversal of 31200040020004 is 40002004000213.

It is a self number, because there is not a number n which added to its sum of digits gives 31200040020004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23528707 + ... + 24819349.

It is an arithmetic number, because the mean of its divisors is an integer number (2277183879432).

Almost surely, 2^{31200040020004} is an apocalyptic number.

It is an amenable number.

31200040020004 is a deficient number, since it is larger than the sum of its proper divisors (23452373086364).

31200040020004 is a wasteful number, since it uses less digits than its factorization.

31200040020004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296435 (or 1296433 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 31200040020004 its reverse (40002004000213), we get a palindrome (71202044020217).

The spelling of 31200040020004 in words is "thirty-one trillion, two hundred billion, forty million, twenty thousand, four".