18927444659 has 2 divisors, whose sum is σ = 18927444660. Its totient is φ = 18927444658.

The previous prime is 18927444623. The next prime is 18927444677. The reversal of 18927444659 is 95644472981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18927444659 is a prime.

It is a super-2 number, since 2×18927444659² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18927444598 and 18927444607.

It is not a weakly prime, because it can be changed into another prime (18927444059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9463722329 + 9463722330.

It is an arithmetic number, because the mean of its divisors is an integer number (9463722330).

Almost surely, 2^18927444659 is an apocalyptic number.

18927444659 is a deficient number, since it is larger than the sum of its proper divisors (1).

18927444659 is an equidigital number, since it uses as much as digits as its factorization.

18927444659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 59.

The spelling of 18927444659 in words is "eighteen billion, nine hundred twenty-seven million, four hundred forty-four thousand, six hundred fifty-nine".