18248820 has 48 divisors (see below), whose sum is σ = 54105408. Its totient is φ = 4579840.

The previous prime is 18248809. The next prime is 18248833. The reversal of 18248820 is 2884281.

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, 7926 + ... + 9965.

It is an arithmetic number, because the mean of its divisors is an integer number (1127196).

Almost surely, 2^18248820 is an apocalyptic number.

18248820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18248820 is an abundant number, since it is smaller than the sum of its proper divisors (35856588).

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

18248820 is a wasteful number, since it uses less digits than its factorization.

18248820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17920 (or 17918 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 18248820 is about 4271.8637618726. The cubic root of 18248820 is about 263.2761969007.

The spelling of 18248820 in words is "eighteen million, two hundred forty-eight thousand, eight hundred twenty".