18280725338 has 16 divisors (see below), whose sum is σ = 27982021536. Its totient is φ = 8953922640.

The previous prime is 18280725319. The next prime is 18280725347. The reversal of 18280725338 is 83352708281.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18280725292 and 18280725301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65948 + ... + 202263.

It is an arithmetic number, because the mean of its divisors is an integer number (1748876346).

Almost surely, 2^18280725338 is an apocalyptic number.

18280725338 is a deficient number, since it is larger than the sum of its proper divisors (9701296198).

18280725338 is a wasteful number, since it uses less digits than its factorization.

18280725338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268909.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 18280725338 in words is "eighteen billion, two hundred eighty million, seven hundred twenty-five thousand, three hundred thirty-eight".