18955853990 has 16 divisors (see below), whose sum is σ = 34137866448. Its totient is φ = 7578490656.

The previous prime is 18955853923. The next prime is 18955854067. The reversal of 18955853990 is 9935855981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460652 + ... + 500111.

It is an arithmetic number, because the mean of its divisors is an integer number (2133616653).

Almost surely, 2^18955853990 is an apocalyptic number.

18955853990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18955853990 is a deficient number, since it is larger than the sum of its proper divisors (15182012458).

18955853990 is a wasteful number, since it uses less digits than its factorization.

18955853990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962743.

The product of its (nonzero) digits is 17496000, while the sum is 62.

The spelling of 18955853990 in words is "eighteen billion, nine hundred fifty-five million, eight hundred fifty-three thousand, nine hundred ninety".