18261393707 has 2 divisors, whose sum is σ = 18261393708. Its totient is φ = 18261393706.

The previous prime is 18261393671. The next prime is 18261393737. The reversal of 18261393707 is 70739316281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18261393707 - 2⁶ = 18261393643 is a prime.

It is not a weakly prime, because it can be changed into another prime (18261393737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9130696853 + 9130696854.

It is an arithmetic number, because the mean of its divisors is an integer number (9130696854).

Almost surely, 2^18261393707 is an apocalyptic number.

18261393707 is a deficient number, since it is larger than the sum of its proper divisors (1).

18261393707 is an equidigital number, since it uses as much as digits as its factorization.

18261393707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 18261393707 in words is "eighteen billion, two hundred sixty-one million, three hundred ninety-three thousand, seven hundred seven".