18855724330 has 16 divisors (see below), whose sum is σ = 33942096864. Its totient is φ = 7541891280.

The previous prime is 18855724313. The next prime is 18855724379. The reversal of 18855724330 is 3342755881.

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, 217009 + ... + 291211.

It is an arithmetic number, because the mean of its divisors is an integer number (2121381054).

Almost surely, 2^18855724330 is an apocalyptic number.

18855724330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18855724330 is a deficient number, since it is larger than the sum of its proper divisors (15086372534).

18855724330 is a wasteful number, since it uses less digits than its factorization.

18855724330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99621.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 18855724330 in words is "eighteen billion, eight hundred fifty-five million, seven hundred twenty-four thousand, three hundred thirty".