18954891339 has 4 divisors (see below), whose sum is σ = 25273188456. Its totient is φ = 12636594224.

The previous prime is 18954891311. The next prime is 18954891407. The reversal of 18954891339 is 93319845981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18954891339 - 2²⁹ = 18418020427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18954871339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3159148554 + ... + 3159148559.

It is an arithmetic number, because the mean of its divisors is an integer number (6318297114).

Almost surely, 2^18954891339 is an apocalyptic number.

18954891339 is a deficient number, since it is larger than the sum of its proper divisors (6318297117).

18954891339 is an equidigital number, since it uses as much as digits as its factorization.

18954891339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6318297116.

The product of its digits is 8398080, while the sum is 60.

The spelling of 18954891339 in words is "eighteen billion, nine hundred fifty-four million, eight hundred ninety-one thousand, three hundred thirty-nine".