21083076 has 36 divisors (see below), whose sum is σ = 60907392. Its totient is φ = 6023664.

The previous prime is 21083063. The next prime is 21083093. The reversal of 21083076 is 67038012.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 41580 + ... + 42083.

It is an arithmetic number, because the mean of its divisors is an integer number (1691872).

Almost surely, 2^21083076 is an apocalyptic number.

It is an amenable number.

21083076 is an abundant number, since it is smaller than the sum of its proper divisors (39824316).

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

21083076 is a wasteful number, since it uses less digits than its factorization.

21083076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83680 (or 83675 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21083076 is about 4591.6310827417. The cubic root of 21083076 is about 276.2557490801.

It can be divided in two parts, 2108 and 3076, that added together give a square (5184 = 72²).

The spelling of 21083076 in words is "twenty-one million, eighty-three thousand, seventy-six".