18530918401 has 2 divisors, whose sum is σ = 18530918402. Its totient is φ = 18530918400.

The previous prime is 18530918383. The next prime is 18530918411. The reversal of 18530918401 is 10481903581.

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., 12454560000 + 6076358401 = 111600^2 + 77951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18530918401 is a prime.

It is not a weakly prime, because it can be changed into another prime (18530918411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265459200 + 9265459201.

It is an arithmetic number, because the mean of its divisors is an integer number (9265459201).

Almost surely, 2^18530918401 is an apocalyptic number.

It is an amenable number.

18530918401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18530918401 is an equidigital number, since it uses as much as digits as its factorization.

18530918401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 18530918401 in words is "eighteen billion, five hundred thirty million, nine hundred eighteen thousand, four hundred one".