18146820 has 48 divisors (see below), whose sum is σ = 53803008. Its totient is φ = 4554240.

The previous prime is 18146813. The next prime is 18146831. The reversal of 18146820 is 2864181.

It is a super-2 number, since 2×18146820² = 658614152224800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 7876 + ... + 9915.

It is an arithmetic number, because the mean of its divisors is an integer number (1120896).

Almost surely, 2^18146820 is an apocalyptic number.

18146820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18146820 is an abundant number, since it is smaller than the sum of its proper divisors (35656188).

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

18146820 is a wasteful number, since it uses less digits than its factorization.

18146820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17820 (or 17818 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18146820 is about 4259.9084497205. The cubic root of 18146820 is about 262.7847612727.

The spelling of 18146820 in words is "eighteen million, one hundred forty-six thousand, eight hundred twenty".