18380004556 has 12 divisors (see below), whose sum is σ = 32168743992. Its totient is φ = 9188934848.

The previous prime is 18380004553. The next prime is 18380004571. The reversal of 18380004556 is 65540008381.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (18380004553) 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, 227470 + ... + 297493.

It is an arithmetic number, because the mean of its divisors is an integer number (2680728666).

Almost surely, 2^18380004556 is an apocalyptic number.

It is an amenable number.

18380004556 is a deficient number, since it is larger than the sum of its proper divisors (13788739436).

18380004556 is a wasteful number, since it uses less digits than its factorization.

18380004556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533720 (or 533718 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 18380004556 in words is "eighteen billion, three hundred eighty million, four thousand, five hundred fifty-six".