31930638763340 has 24 divisors (see below), whose sum is σ = 67807760973120. Its totient is φ = 12628747015808.

The previous prime is 31930638763333. The next prime is 31930638763391. The reversal of 31930638763340 is 4336783603913.

It is a super-2 number, since 2×31930638763340² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8969278772 + ... + 8969282331.

It is an arithmetic number, because the mean of its divisors is an integer number (2825323373880).

Almost surely, 2^{31930638763340} is an apocalyptic number.

It is an amenable number.

31930638763340 is an abundant number, since it is smaller than the sum of its proper divisors (35877122209780).

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

31930638763340 is a wasteful number, since it uses less digits than its factorization.

31930638763340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17938561201 (or 17938561199 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 56.

The spelling of 31930638763340 in words is "thirty-one trillion, nine hundred thirty billion, six hundred thirty-eight million, seven hundred sixty-three thousand, three hundred forty".