18527820 has 48 divisors (see below), whose sum is σ = 52372320. Its totient is φ = 4893696.

The previous prime is 18527813. The next prime is 18527833. The reversal of 18527820 is 2872581.

It is a super-2 number, since 2×18527820² = 686560227904800, which contains 22 as substring.

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, 5124 + ... + 7956.

It is an arithmetic number, because the mean of its divisors is an integer number (1091090).

Almost surely, 2^18527820 is an apocalyptic number.

18527820 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 18527820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26186160).

18527820 is an abundant number, since it is smaller than the sum of its proper divisors (33844500).

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

18527820 is a wasteful number, since it uses less digits than its factorization.

18527820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954 (or 2952 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 18527820 is about 4304.3954279318. The cubic root of 18527820 is about 264.6111301250.

The spelling of 18527820 in words is "eighteen million, five hundred twenty-seven thousand, eight hundred twenty".