18340897836 has 12 divisors (see below), whose sum is σ = 42795428312. Its totient is φ = 6113632608.

The previous prime is 18340897829. The next prime is 18340897873. The reversal of 18340897836 is 63879804381.

It is a tau number, because it is divible by the number of its divisors (12).

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, 764204065 + ... + 764204088.

Almost surely, 2^18340897836 is an apocalyptic number.

It is an amenable number.

18340897836 is an abundant number, since it is smaller than the sum of its proper divisors (24454530476).

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

18340897836 is a wasteful number, since it uses less digits than its factorization.

18340897836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528408160 (or 1528408158 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 18340897836 in words is "eighteen billion, three hundred forty million, eight hundred ninety-seven thousand, eight hundred thirty-six".