31230103020 has 48 divisors (see below), whose sum is σ = 88926405120. Its totient is φ = 8186873536.

The previous prime is 31230103013. The next prime is 31230103039. The reversal of 31230103020 is 2030103213.

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

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, 4407492 + ... + 4414571.

It is an arithmetic number, because the mean of its divisors is an integer number (1852633440).

Almost surely, 2^31230103020 is an apocalyptic number.

31230103020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31230103020 is an abundant number, since it is smaller than the sum of its proper divisors (57696302100).

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

31230103020 is a wasteful number, since it uses less digits than its factorization.

31230103020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8822134 (or 8822132 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31230103020 its reverse (2030103213), we get a palindrome (33260206233).

The spelling of 31230103020 in words is "thirty-one billion, two hundred thirty million, one hundred three thousand, twenty".