18037687979 has 2 divisors, whose sum is σ = 18037687980. Its totient is φ = 18037687978.

The previous prime is 18037687963. The next prime is 18037687991. The reversal of 18037687979 is 97978673081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18037687979 - 2⁴ = 18037687963 is a prime.

It is a super-2 number, since 2×18037687979² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18037687909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9018843989 + 9018843990.

It is an arithmetic number, because the mean of its divisors is an integer number (9018843990).

Almost surely, 2^18037687979 is an apocalyptic number.

18037687979 is a deficient number, since it is larger than the sum of its proper divisors (1).

18037687979 is an equidigital number, since it uses as much as digits as its factorization.

18037687979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32006016, while the sum is 65.

The spelling of 18037687979 in words is "eighteen billion, thirty-seven million, six hundred eighty-seven thousand, nine hundred seventy-nine".