18862611913 has 2 divisors, whose sum is σ = 18862611914. Its totient is φ = 18862611912.

The previous prime is 18862611863. The next prime is 18862611917. The reversal of 18862611913 is 31911626881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18264711609 + 597900304 = 135147^2 + 24452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18862611913 is a prime.

It is not a weakly prime, because it can be changed into another prime (18862611917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9431305956 + 9431305957.

It is an arithmetic number, because the mean of its divisors is an integer number (9431305957).

Almost surely, 2^18862611913 is an apocalyptic number.

It is an amenable number.

18862611913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18862611913 is an equidigital number, since it uses as much as digits as its factorization.

18862611913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The spelling of 18862611913 in words is "eighteen billion, eight hundred sixty-two million, six hundred eleven thousand, nine hundred thirteen".