18354920 has 64 divisors (see below), whose sum is σ = 43856640. Its totient is φ = 6899200.

The previous prime is 18354913. The next prime is 18354949. The reversal of 18354920 is 2945381.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65180 + ... + 65460.

It is an arithmetic number, because the mean of its divisors is an integer number (685260).

Almost surely, 2^18354920 is an apocalyptic number.

18354920 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 18354920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21928320).

18354920 is an abundant number, since it is smaller than the sum of its proper divisors (25501720).

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

18354920 is a wasteful number, since it uses less digits than its factorization.

18354920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18354920 is about 4284.2642308803. The cubic root of 18354920 is about 263.7854470451.

The spelling of 18354920 in words is "eighteen million, three hundred fifty-four thousand, nine hundred twenty".