18995339990 has 64 divisors (see below), whose sum is σ = 38255431680. Its totient is φ = 6731706240.

The previous prime is 18995339989. The next prime is 18995340109. The reversal of 18995339990 is 9993359981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1227944 + ... + 1243316.

It is an arithmetic number, because the mean of its divisors is an integer number (597741120).

Almost surely, 2^18995339990 is an apocalyptic number.

18995339990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18995339990 is an abundant number, since it is smaller than the sum of its proper divisors (19260091690).

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

18995339990 is a wasteful number, since it uses less digits than its factorization.

18995339990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15677.

The product of its (nonzero) digits is 21257640, while the sum is 65.

The spelling of 18995339990 in words is "eighteen billion, nine hundred ninety-five million, three hundred thirty-nine thousand, nine hundred ninety".