18334335820 has 12 divisors (see below), whose sum is σ = 38502105264. Its totient is φ = 7333734320.

The previous prime is 18334335791. The next prime is 18334335839. The reversal of 18334335820 is 2853343381.

It is a super-2 number, since 2×18334335820² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458358376 + ... + 458358415.

It is an arithmetic number, because the mean of its divisors is an integer number (3208508772).

Almost surely, 2^18334335820 is an apocalyptic number.

18334335820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18334335820 is an abundant number, since it is smaller than the sum of its proper divisors (20167769444).

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

18334335820 is a wasteful number, since it uses less digits than its factorization.

18334335820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916716800 (or 916716798 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 18334335820 in words is "eighteen billion, three hundred thirty-four million, three hundred thirty-five thousand, eight hundred twenty".