31030331330020 has 48 divisors (see below), whose sum is σ = 71198224711488. Its totient is φ = 11266208184960.

The previous prime is 31030331330003. The next prime is 31030331330029. The reversal of 31030331330020 is 2003313303013.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 31030331329973 and 31030331330000.

It is not an unprimeable number, because it can be changed into a prime (31030331330029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109537359 + ... + 109820278.

It is an arithmetic number, because the mean of its divisors is an integer number (1483296348156).

Almost surely, 2^{31030331330020} is an apocalyptic number.

It is an amenable number.

31030331330020 is an abundant number, since it is smaller than the sum of its proper divisors (40167893381468).

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

31030331330020 is a wasteful number, since it uses less digits than its factorization.

31030331330020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219358300 (or 219358298 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 31030331330020 its reverse (2003313303013), we get a palindrome (33033644633033).

The spelling of 31030331330020 in words is "thirty-one trillion, thirty billion, three hundred thirty-one million, three hundred thirty thousand, twenty".