18955743071 has 2 divisors, whose sum is σ = 18955743072. Its totient is φ = 18955743070.

The previous prime is 18955743067. The next prime is 18955743119. The reversal of 18955743071 is 17034755981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18955743071 - 2² = 18955743067 is a prime.

It is a super-2 number, since 2×18955743071² (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 (18955743041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9477871535 + 9477871536.

It is an arithmetic number, because the mean of its divisors is an integer number (9477871536).

Almost surely, 2^18955743071 is an apocalyptic number.

18955743071 is a deficient number, since it is larger than the sum of its proper divisors (1).

18955743071 is an equidigital number, since it uses as much as digits as its factorization.

18955743071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 18955743071 in words is "eighteen billion, nine hundred fifty-five million, seven hundred forty-three thousand, seventy-one".