21083070 has 32 divisors (see below), whose sum is σ = 51098112. Its totient is φ = 5566752.

The previous prime is 21083063. The next prime is 21083093. The reversal of 21083070 is 7038012.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (1596816).

Almost surely, 2^21083070 is an apocalyptic number.

21083070 is an abundant number, since it is smaller than the sum of its proper divisors (30015042).

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

21083070 is a wasteful number, since it uses less digits than its factorization.

21083070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6936.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21083070 is about 4591.6304293791. The cubic root of 21083070 is about 276.2557228737.

The spelling of 21083070 in words is "twenty-one million, eighty-three thousand, seventy".