31213413442020 has 48 divisors (see below), whose sum is σ = 87436908554688. Its totient is φ = 8319829211520.

The previous prime is 31213413441989. The next prime is 31213413442031. The reversal of 31213413442020 is 2024431431213.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116981454 + ... + 117247973.

It is an arithmetic number, because the mean of its divisors is an integer number (1821602261556).

Almost surely, 2^{31213413442020} is an apocalyptic number.

31213413442020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31213413442020 is an abundant number, since it is smaller than the sum of its proper divisors (56223495112668).

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

31213413442020 is a wasteful number, since it uses less digits than its factorization.

31213413442020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234231660 (or 234231658 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 31213413442020 its reverse (2024431431213), we get a palindrome (33237844873233).

The spelling of 31213413442020 in words is "thirty-one trillion, two hundred thirteen billion, four hundred thirteen million, four hundred forty-two thousand, twenty".