18797731627 has 2 divisors, whose sum is σ = 18797731628. Its totient is φ = 18797731626.

The previous prime is 18797731621. The next prime is 18797731661. The reversal of 18797731627 is 72613779781.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18797731627 - 2¹⁵ = 18797698859 is a prime.

It is not a weakly prime, because it can be changed into another prime (18797731621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9398865813 + 9398865814.

It is an arithmetic number, because the mean of its divisors is an integer number (9398865814).

Almost surely, 2^18797731627 is an apocalyptic number.

18797731627 is a deficient number, since it is larger than the sum of its proper divisors (1).

18797731627 is an equidigital number, since it uses as much as digits as its factorization.

18797731627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6223392, while the sum is 58.

The spelling of 18797731627 in words is "eighteen billion, seven hundred ninety-seven million, seven hundred thirty-one thousand, six hundred twenty-seven".