18104570321 has 2 divisors, whose sum is σ = 18104570322. Its totient is φ = 18104570320.

The previous prime is 18104570287. The next prime is 18104570347. The reversal of 18104570321 is 12307540181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17985760321 + 118810000 = 134111^2 + 10900^2 .

It is a cyclic number.

It is not a de Polignac number, because 18104570321 - 2²⁶ = 18037461457 is a prime.

It is not a weakly prime, because it can be changed into another prime (18104570621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9052285160 + 9052285161.

It is an arithmetic number, because the mean of its divisors is an integer number (9052285161).

Almost surely, 2^18104570321 is an apocalyptic number.

It is an amenable number.

18104570321 is a deficient number, since it is larger than the sum of its proper divisors (1).

18104570321 is an equidigital number, since it uses as much as digits as its factorization.

18104570321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 18104570321 in words is "eighteen billion, one hundred four million, five hundred seventy thousand, three hundred twenty-one".