18392377849 has 2 divisors, whose sum is σ = 18392377850. Its totient is φ = 18392377848.

The previous prime is 18392377793. The next prime is 18392377873. The reversal of 18392377849 is 94877329381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18310149225 + 82228624 = 135315^2 + 9068^2 .

It is a cyclic number.

It is not a de Polignac number, because 18392377849 - 2⁷ = 18392377721 is a prime.

It is not a weakly prime, because it can be changed into another prime (18392377349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9196188924 + 9196188925.

It is an arithmetic number, because the mean of its divisors is an integer number (9196188925).

Almost surely, 2^18392377849 is an apocalyptic number.

It is an amenable number.

18392377849 is a deficient number, since it is larger than the sum of its proper divisors (1).

18392377849 is an equidigital number, since it uses as much as digits as its factorization.

18392377849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 61.

The spelling of 18392377849 in words is "eighteen billion, three hundred ninety-two million, three hundred seventy-seven thousand, eight hundred forty-nine".