18126339919 has 2 divisors, whose sum is σ = 18126339920. Its totient is φ = 18126339918.

The previous prime is 18126339839. The next prime is 18126339937. The reversal of 18126339919 is 91993362181.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18126339919 - 2²¹ = 18124242767 is a prime.

It is a super-2 number, since 2×18126339919² (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 (18126336919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9063169959 + 9063169960.

It is an arithmetic number, because the mean of its divisors is an integer number (9063169960).

Almost surely, 2^18126339919 is an apocalyptic number.

18126339919 is a deficient number, since it is larger than the sum of its proper divisors (1).

18126339919 is an equidigital number, since it uses as much as digits as its factorization.

18126339919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 52.

The spelling of 18126339919 in words is "eighteen billion, one hundred twenty-six million, three hundred thirty-nine thousand, nine hundred nineteen".