31120020302004 has 72 divisors (see below), whose sum is σ = 80343404738688. Its totient is φ = 10151974062720.

The previous prime is 31120020302003. The next prime is 31120020302053. The reversal of 31120020302004 is 40020302002113.

It is a super-2 number, since 2×31120020302004² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120020302003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25921584 + ... + 27095544.

Almost surely, 2^{31120020302004} is an apocalyptic number.

It is an amenable number.

31120020302004 is an abundant number, since it is smaller than the sum of its proper divisors (49223384436684).

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

31120020302004 is a wasteful number, since it uses less digits than its factorization.

31120020302004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189685 (or 1189680 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31120020302004 its reverse (40020302002113), we get a palindrome (71140322304117).

The spelling of 31120020302004 in words is "thirty-one trillion, one hundred twenty billion, twenty million, three hundred two thousand, four".