18333834990 has 32 divisors (see below), whose sum is σ = 44014661280. Its totient is φ = 4887527424.

The previous prime is 18333834947. The next prime is 18333834991. The reversal of 18333834990 is 9943833381.

It is a super-2 number, since 2×18333834990² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18333834991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8082 + ... + 191658.

It is an arithmetic number, because the mean of its divisors is an integer number (1375458165).

Almost surely, 2^18333834990 is an apocalyptic number.

18333834990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18333834990 is an abundant number, since it is smaller than the sum of its proper divisors (25680826290).

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

18333834990 is a wasteful number, since it uses less digits than its factorization.

18333834990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186916.

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 18333834990 in words is "eighteen billion, three hundred thirty-three million, eight hundred thirty-four thousand, nine hundred ninety".