18154293919 has 2 divisors, whose sum is σ = 18154293920. Its totient is φ = 18154293918.

The previous prime is 18154293887. The next prime is 18154293961. The reversal of 18154293919 is 91939245181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18154293919 - 2⁵ = 18154293887 is a prime.

It is a super-2 number, since 2×18154293919² (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 (18154293979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9077146959 + 9077146960.

It is an arithmetic number, because the mean of its divisors is an integer number (9077146960).

Almost surely, 2^18154293919 is an apocalyptic number.

18154293919 is a deficient number, since it is larger than the sum of its proper divisors (1).

18154293919 is an equidigital number, since it uses as much as digits as its factorization.

18154293919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 52.

The spelling of 18154293919 in words is "eighteen billion, one hundred fifty-four million, two hundred ninety-three thousand, nine hundred nineteen".