31123003604 has 48 divisors (see below), whose sum is σ = 67919268480. Its totient is φ = 12123250560.

The previous prime is 31123003577. The next prime is 31123003607. The reversal of 31123003604 is 40630032113.

It is a self number, because there is not a number n which added to its sum of digits gives 31123003604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123003607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2095934 + ... + 2110730.

It is an arithmetic number, because the mean of its divisors is an integer number (1414984760).

Almost surely, 2^31123003604 is an apocalyptic number.

It is an amenable number.

31123003604 is an abundant number, since it is smaller than the sum of its proper divisors (36796264876).

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

31123003604 is a wasteful number, since it uses less digits than its factorization.

31123003604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21648 (or 21646 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31123003604 its reverse (40630032113), we get a palindrome (71753035717).

The spelling of 31123003604 in words is "thirty-one billion, one hundred twenty-three million, three thousand, six hundred four".