18765020 has 12 divisors (see below), whose sum is σ = 39406584. Its totient is φ = 7506000.

The previous prime is 18765017. The next prime is 18765029. The reversal of 18765020 is 2056781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18765029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469106 + ... + 469145.

It is an arithmetic number, because the mean of its divisors is an integer number (3283882).

Almost surely, 2^18765020 is an apocalyptic number.

18765020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18765020 is an abundant number, since it is smaller than the sum of its proper divisors (20641564).

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

18765020 is a wasteful number, since it uses less digits than its factorization.

18765020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938260 (or 938258 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 18765020 is about 4331.8610319354. The cubic root of 18765020 is about 265.7355617251.

The spelling of 18765020 in words is "eighteen million, seven hundred sixty-five thousand, twenty".