18366415420 has 48 divisors (see below), whose sum is σ = 40211186400. Its totient is φ = 7040307456.

The previous prime is 18366415393. The next prime is 18366415427. The reversal of 18366415420 is 2451466381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366415427) 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, 155895 + ... + 247054.

It is an arithmetic number, because the mean of its divisors is an integer number (837733050).

Almost surely, 2^18366415420 is an apocalyptic number.

18366415420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18366415420 is an abundant number, since it is smaller than the sum of its proper divisors (21844770980).

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

18366415420 is a wasteful number, since it uses less digits than its factorization.

18366415420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403054 (or 403052 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 18366415420 in words is "eighteen billion, three hundred sixty-six million, four hundred fifteen thousand, four hundred twenty".