18904319019 has 12 divisors (see below), whose sum is σ = 27435654792. Its totient is φ = 12543148800.

The previous prime is 18904318997. The next prime is 18904319023. The reversal of 18904319019 is 91091340981.

It is not a de Polignac number, because 18904319019 - 2⁵ = 18904318987 is a prime.

It is a super-2 number, since 2×18904319019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18904319069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4975542 + ... + 4979339.

It is an arithmetic number, because the mean of its divisors is an integer number (2286304566).

Almost surely, 2^18904319019 is an apocalyptic number.

18904319019 is a deficient number, since it is larger than the sum of its proper divisors (8531335773).

18904319019 is a wasteful number, since it uses less digits than its factorization.

18904319019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9955098 (or 9955095 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The spelling of 18904319019 in words is "eighteen billion, nine hundred four million, three hundred nineteen thousand, nineteen".