18825620 has 24 divisors (see below), whose sum is σ = 43128288. Its totient is φ = 6845600.

The previous prime is 18825607. The next prime is 18825643. The reversal of 18825620 is 2652881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42566 + ... + 43005.

It is an arithmetic number, because the mean of its divisors is an integer number (1797012).

Almost surely, 2^18825620 is an apocalyptic number.

18825620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18825620 is an abundant number, since it is smaller than the sum of its proper divisors (24302668).

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

18825620 is a wasteful number, since it uses less digits than its factorization.

18825620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85591 (or 85589 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 18825620 is about 4338.8500780737. The cubic root of 18825620 is about 266.0213109728.

The spelling of 18825620 in words is "eighteen million, eight hundred twenty-five thousand, six hundred twenty".