21080596 has 6 divisors (see below), whose sum is σ = 36891050. Its totient is φ = 10540296.

The previous prime is 21080573. The next prime is 21080599. The reversal of 21080596 is 69508012.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 2676496 = 4290^2 + 1636^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21080599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2635071 + ... + 2635078.

Almost surely, 2^21080596 is an apocalyptic number.

It is an amenable number.

21080596 is a deficient number, since it is larger than the sum of its proper divisors (15810454).

21080596 is a wasteful number, since it uses less digits than its factorization.

21080596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270153 (or 5270151 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 21080596 is about 4591.3610182603. The cubic root of 21080596 is about 276.2449166772.

The spelling of 21080596 in words is "twenty-one million, eighty thousand, five hundred ninety-six".