20883816 has 48 divisors (see below), whose sum is σ = 59024160. Its totient is φ = 6658080.

The previous prime is 20883781. The next prime is 20883823. The reversal of 20883816 is 61838802.

It is a super-2 number, since 2×20883816² = 872267541443712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4650 + ... + 7961.

It is an arithmetic number, because the mean of its divisors is an integer number (1229670).

Almost surely, 2^20883816 is an apocalyptic number.

It is an amenable number.

20883816 is an abundant number, since it is smaller than the sum of its proper divisors (38140344).

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

20883816 is a wasteful number, since it uses less digits than its factorization.

20883816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12646 (or 12639 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 20883816 is about 4569.8813988987. The cubic root of 20883816 is about 275.3826782536.

The spelling of 20883816 in words is "twenty million, eight hundred eighty-three thousand, eight hundred sixteen".