18902035990 has 32 divisors (see below), whose sum is σ = 36041254560. Its totient is φ = 7112861184.

The previous prime is 18902035963. The next prime is 18902036033. The reversal of 18902035990 is 9953020981.

It is a self number, because there is not a number n which added to its sum of digits gives 18902035990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372781 + ... + 420439.

It is an arithmetic number, because the mean of its divisors is an integer number (1126289205).

Almost surely, 2^18902035990 is an apocalyptic number.

18902035990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18902035990 is a deficient number, since it is larger than the sum of its proper divisors (17139218570).

18902035990 is a wasteful number, since it uses less digits than its factorization.

18902035990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50016.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 18902035990 in words is "eighteen billion, nine hundred two million, thirty-five thousand, nine hundred ninety".