18461894713 has 2 divisors, whose sum is σ = 18461894714. Its totient is φ = 18461894712.

The previous prime is 18461894669. The next prime is 18461894743. The reversal of 18461894713 is 31749816481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17750765824 + 711128889 = 133232^2 + 26667^2 .

It is a cyclic number.

It is not a de Polignac number, because 18461894713 - 2¹⁷ = 18461763641 is a prime.

It is not a weakly prime, because it can be changed into another prime (18461894743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9230947356 + 9230947357.

It is an arithmetic number, because the mean of its divisors is an integer number (9230947357).

Almost surely, 2^18461894713 is an apocalyptic number.

It is an amenable number.

18461894713 is a deficient number, since it is larger than the sum of its proper divisors (1).

18461894713 is an equidigital number, since it uses as much as digits as its factorization.

18461894713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The spelling of 18461894713 in words is "eighteen billion, four hundred sixty-one million, eight hundred ninety-four thousand, seven hundred thirteen".