18236366620 has 12 divisors (see below), whose sum is σ = 38296369944. Its totient is φ = 7294546640.

The previous prime is 18236366591. The next prime is 18236366627. The reversal of 18236366620 is 2666363281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18236366627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455909146 + ... + 455909185.

It is an arithmetic number, because the mean of its divisors is an integer number (3191364162).

Almost surely, 2^18236366620 is an apocalyptic number.

18236366620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18236366620 is an abundant number, since it is smaller than the sum of its proper divisors (20060003324).

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

18236366620 is a wasteful number, since it uses less digits than its factorization.

18236366620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911818340 (or 911818338 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 18236366620 in words is "eighteen billion, two hundred thirty-six million, three hundred sixty-six thousand, six hundred twenty".