18700943071 has 2 divisors, whose sum is σ = 18700943072. Its totient is φ = 18700943070.

The previous prime is 18700943033. The next prime is 18700943087. The reversal of 18700943071 is 17034900781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18700943071 - 2¹¹ = 18700941023 is a prime.

It is a super-2 number, since 2×18700943071² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18700943011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9350471535 + 9350471536.

It is an arithmetic number, because the mean of its divisors is an integer number (9350471536).

Almost surely, 2^18700943071 is an apocalyptic number.

18700943071 is a deficient number, since it is larger than the sum of its proper divisors (1).

18700943071 is an equidigital number, since it uses as much as digits as its factorization.

18700943071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 18700943071 in words is "eighteen billion, seven hundred million, nine hundred forty-three thousand, seventy-one".