18796820 has 24 divisors (see below), whose sum is σ = 45112704. Its totient is φ = 6444576.

The previous prime is 18796801. The next prime is 18796823. The reversal of 18796820 is 2869781.

It is a super-2 number, since 2×18796820² = 706640884224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18796823) by changing a digit.

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, 66992 + ... + 67271.

It is an arithmetic number, because the mean of its divisors is an integer number (1879696).

Almost surely, 2^18796820 is an apocalyptic number.

18796820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18796820 is an abundant number, since it is smaller than the sum of its proper divisors (26315884).

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

18796820 is a wasteful number, since it uses less digits than its factorization.

18796820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134279 (or 134277 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 18796820 is about 4335.5299560723. The cubic root of 18796820 is about 265.8855859348.

The spelling of 18796820 in words is "eighteen million, seven hundred ninety-six thousand, eight hundred twenty".