18252620 has 12 divisors (see below), whose sum is σ = 38330544. Its totient is φ = 7301040.

The previous prime is 18252607. The next prime is 18252643. The reversal of 18252620 is 2625281.

It is a self number, because there is not a number n which added to its sum of digits gives 18252620.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456296 + ... + 456335.

It is an arithmetic number, because the mean of its divisors is an integer number (3194212).

Almost surely, 2^18252620 is an apocalyptic number.

18252620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18252620 is an abundant number, since it is smaller than the sum of its proper divisors (20077924).

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

18252620 is a wasteful number, since it uses less digits than its factorization.

18252620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912640 (or 912638 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 18252620 is about 4272.3085094595. The cubic root of 18252620 is about 263.2944698651.

The spelling of 18252620 in words is "eighteen million, two hundred fifty-two thousand, six hundred twenty".