17912312057 has 4 divisors (see below), whose sum is σ = 18529978020. Its totient is φ = 17294646096.

The previous prime is 17912312039. The next prime is 17912312161. The reversal of 17912312057 is 75021321971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75021321971 = 124987 ⋅600233.

It can be written as a sum of positive squares in 2 ways, for example, as 11694043321 + 6218268736 = 108139^2 + 78856^2 .

It is a cyclic number.

It is not a de Polignac number, because 17912312057 - 2⁶ = 17912311993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17912312057.

It is not an unprimeable number, because it can be changed into a prime (17912312357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308832938 + ... + 308832995.

It is an arithmetic number, because the mean of its divisors is an integer number (4632494505).

Almost surely, 2^17912312057 is an apocalyptic number.

It is an amenable number.

17912312057 is a deficient number, since it is larger than the sum of its proper divisors (617665963).

17912312057 is an equidigital number, since it uses as much as digits as its factorization.

17912312057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617665962.

The product of its (nonzero) digits is 26460, while the sum is 38.

The spelling of 17912312057 in words is "seventeen billion, nine hundred twelve million, three hundred twelve thousand, fifty-seven".