31203112020 has 48 divisors (see below), whose sum is σ = 90381432960. Its totient is φ = 8033904256.

The previous prime is 31203112013. The next prime is 31203112051. The reversal of 31203112020 is 2021130213.

It is a super-3 number, since 3×31203112020³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 8964672 + ... + 8968151.

It is an arithmetic number, because the mean of its divisors is an integer number (1882946520).

Almost surely, 2^31203112020 is an apocalyptic number.

31203112020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31203112020 is an abundant number, since it is smaller than the sum of its proper divisors (59178320940).

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

31203112020 is a wasteful number, since it uses less digits than its factorization.

31203112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17932864 (or 17932862 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31203112020 its reverse (2021130213), we get a palindrome (33224242233).

The spelling of 31203112020 in words is "thirty-one billion, two hundred three million, one hundred twelve thousand, twenty".