18557406339 has 4 divisors (see below), whose sum is σ = 24743208456. Its totient is φ = 12371604224.

The previous prime is 18557406337. The next prime is 18557406353. The reversal of 18557406339 is 93360475581.

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 18557406339 - 2¹ = 18557406337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18557406291 and 18557406300.

It is not an unprimeable number, because it can be changed into a prime (18557406337) 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, 3092901054 + ... + 3092901059.

It is an arithmetic number, because the mean of its divisors is an integer number (6185802114).

Almost surely, 2^18557406339 is an apocalyptic number.

18557406339 is a deficient number, since it is larger than the sum of its proper divisors (6185802117).

18557406339 is an equidigital number, since it uses as much as digits as its factorization.

18557406339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185802116.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 18557406339 in words is "eighteen billion, five hundred fifty-seven million, four hundred six thousand, three hundred thirty-nine".