20183820 has 24 divisors (see below), whose sum is σ = 56514864. Its totient is φ = 5382336.

The previous prime is 20183819. The next prime is 20183827. The reversal of 20183820 is 2838102.

It is not an unprimeable number, because it can be changed into a prime (20183827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168139 + ... + 168258.

It is an arithmetic number, because the mean of its divisors is an integer number (2354786).

Almost surely, 2^20183820 is an apocalyptic number.

20183820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20183820 is an abundant number, since it is smaller than the sum of its proper divisors (36331044).

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

20183820 is a wasteful number, since it uses less digits than its factorization.

20183820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336409 (or 336407 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20183820 is about 4492.6406488835. The cubic root of 20183820 is about 272.2708338997.

The spelling of 20183820 in words is "twenty million, one hundred eighty-three thousand, eight hundred twenty".