18846031297 has 4 divisors (see below), whose sum is σ = 18854754436. Its totient is φ = 18837308160.

The previous prime is 18846031291. The next prime is 18846031319. The reversal of 18846031297 is 79213064881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9802782081 + 9043249216 = 99009^2 + 95096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18846031297 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 18846031297.

It is not an unprimeable number, because it can be changed into a prime (18846031291) 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, 4358328 + ... + 4362649.

It is an arithmetic number, because the mean of its divisors is an integer number (4713688609).

Almost surely, 2^18846031297 is an apocalyptic number.

It is an amenable number.

18846031297 is a deficient number, since it is larger than the sum of its proper divisors (8723139).

18846031297 is an equidigital number, since it uses as much as digits as its factorization.

18846031297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8723138.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 18846031297 in words is "eighteen billion, eight hundred forty-six million, thirty-one thousand, two hundred ninety-seven".