20833988 has 12 divisors (see below), whose sum is σ = 41668032. Its totient is φ = 8928840.

The previous prime is 20833987. The next prime is 20833991. The reversal of 20833988 is 88933802.

20833988 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20833987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372008 + ... + 372063.

It is an arithmetic number, because the mean of its divisors is an integer number (3472336).

Almost surely, 2^20833988 is an apocalyptic number.

20833988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20833988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20833988 is a wasteful number, since it uses less digits than its factorization.

20833988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744082 (or 744080 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 20833988 is about 4564.4263604532. The cubic root of 20833988 is about 275.1634862600.

The spelling of 20833988 in words is "twenty million, eight hundred thirty-three thousand, nine hundred eighty-eight".