18427979057 has 2 divisors, whose sum is σ = 18427979058. Its totient is φ = 18427979056.

The previous prime is 18427979041. The next prime is 18427979099. The reversal of 18427979057 is 75097972481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18421004176 + 6974881 = 135724^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 18427979057 - 2⁴ = 18427979041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18427978987 and 18427979005.

It is not a weakly prime, because it can be changed into another prime (18427975057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9213989528 + 9213989529.

It is an arithmetic number, because the mean of its divisors is an integer number (9213989529).

Almost surely, 2^18427979057 is an apocalyptic number.

It is an amenable number.

18427979057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18427979057 is an equidigital number, since it uses as much as digits as its factorization.

18427979057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8890560, while the sum is 59.

The spelling of 18427979057 in words is "eighteen billion, four hundred twenty-seven million, nine hundred seventy-nine thousand, fifty-seven".