18730939990 has 32 divisors (see below), whose sum is σ = 39163904064. Its totient is φ = 6316755840.

The previous prime is 18730939967. The next prime is 18730939991. The reversal of 18730939990 is 9993903781.

It is a super-3 number, since 3×18730939990³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18730939991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2189049 + ... + 2197588.

It is an arithmetic number, because the mean of its divisors is an integer number (1223872002).

Almost surely, 2^18730939990 is an apocalyptic number.

18730939990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18730939990 is an abundant number, since it is smaller than the sum of its proper divisors (20432964074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18730939990 is a wasteful number, since it uses less digits than its factorization.

18730939990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386712.

The product of its (nonzero) digits is 3306744, while the sum is 58.

The spelling of 18730939990 in words is "eighteen billion, seven hundred thirty million, nine hundred thirty-nine thousand, nine hundred ninety".