18828020 has 24 divisors (see below), whose sum is σ = 40504968. Its totient is φ = 7347200.

The previous prime is 18828013. The next prime is 18828037. The reversal of 18828020 is 2082881.

It can be written as a sum of positive squares in 4 ways, for example, as 355216 + 18472804 = 596^2 + 4298^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10661 + ... + 12300.

It is an arithmetic number, because the mean of its divisors is an integer number (1687707).

Almost surely, 2^18828020 is an apocalyptic number.

18828020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18828020 is an abundant number, since it is smaller than the sum of its proper divisors (21676948).

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

18828020 is a wasteful number, since it uses less digits than its factorization.

18828020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23011 (or 23009 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 18828020 is about 4339.1266402353. The cubic root of 18828020 is about 266.0326151426.

The spelling of 18828020 in words is "eighteen million, eight hundred twenty-eight thousand, twenty".