18476904807913 has 2 divisors, whose sum is σ = 18476904807914. Its totient is φ = 18476904807912.

The previous prime is 18476904807899. The next prime is 18476904808027. The reversal of 18476904807913 is 31970840967481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18206034523609 + 270870284304 = 4266853^2 + 520452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18476904807913 is a prime.

It is a super-2 number, since 2×18476904807913² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18476904804913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9238452403956 + 9238452403957.

It is an arithmetic number, because the mean of its divisors is an integer number (9238452403957).

Almost surely, 2^{18476904807913} is an apocalyptic number.

It is an amenable number.

18476904807913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18476904807913 is an equidigital number, since it uses as much as digits as its factorization.

18476904807913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73156608, while the sum is 67.

The spelling of 18476904807913 in words is "eighteen trillion, four hundred seventy-six billion, nine hundred four million, eight hundred seven thousand, nine hundred thirteen".