18342313920 has 560 divisors, whose sum is σ = 76334404608. Its totient is φ = 4093286400.

The previous prime is 18342313903. The next prime is 18342313937. The reversal of 18342313920 is 2931324381.

18342313920 is a `hidden beast` number, since 1 + 8 + 34 + 231 + 392 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (18342313903) and next prime (18342313937).

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7800745 + ... + 7803095.

Almost surely, 2^18342313920 is an apocalyptic number.

18342313920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18342313920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38167202304).

18342313920 is an abundant number, since it is smaller than the sum of its proper divisors (57992090688).

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

18342313920 is a wasteful number, since it uses less digits than its factorization.

18342313920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430 (or 2411 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 18342313920 in words is "eighteen billion, three hundred forty-two million, three hundred thirteen thousand, nine hundred twenty".