18627690971 has 2 divisors, whose sum is σ = 18627690972. Its totient is φ = 18627690970.

The previous prime is 18627690943. The next prime is 18627691111. The reversal of 18627690971 is 17909672681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18627690971 - 2¹⁰ = 18627689947 is a prime.

It is a super-2 number, since 2×18627690971² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18627690931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9313845485 + 9313845486.

It is an arithmetic number, because the mean of its divisors is an integer number (9313845486).

Almost surely, 2^18627690971 is an apocalyptic number.

18627690971 is a deficient number, since it is larger than the sum of its proper divisors (1).

18627690971 is an equidigital number, since it uses as much as digits as its factorization.

18627690971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 18627690971 in words is "eighteen billion, six hundred twenty-seven million, six hundred ninety thousand, nine hundred seventy-one".