18407367841 has 2 divisors, whose sum is σ = 18407367842. Its totient is φ = 18407367840.

The previous prime is 18407367791. The next prime is 18407367883. The reversal of 18407367841 is 14876370481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17510964241 + 896403600 = 132329^2 + 29940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18407367841 is a prime.

It is not a weakly prime, because it can be changed into another prime (18407367241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9203683920 + 9203683921.

It is an arithmetic number, because the mean of its divisors is an integer number (9203683921).

Almost surely, 2^18407367841 is an apocalyptic number.

It is an amenable number.

18407367841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18407367841 is an equidigital number, since it uses as much as digits as its factorization.

18407367841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 18407367841 in words is "eighteen billion, four hundred seven million, three hundred sixty-seven thousand, eight hundred forty-one".