17920056538712 has 32 divisors (see below), whose sum is σ = 34337534169600. Its totient is φ = 8763631119264.

The previous prime is 17920056538711. The next prime is 17920056538723. The reversal of 17920056538712 is 21783565002971.

It is a super-2 number, since 2×17920056538712² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17920056538711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15074012 + ... + 16219307.

It is an arithmetic number, because the mean of its divisors is an integer number (1073047942800).

Almost surely, 2^{17920056538712} is an apocalyptic number.

It is an amenable number.

17920056538712 is a deficient number, since it is larger than the sum of its proper divisors (16417477630888).

17920056538712 is a wasteful number, since it uses less digits than its factorization.

17920056538712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31294895 (or 31294891 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 56.

The spelling of 17920056538712 in words is "seventeen trillion, nine hundred twenty billion, fifty-six million, five hundred thirty-eight thousand, seven hundred twelve".