21037080 has 32 divisors (see below), whose sum is σ = 63111600. Its totient is φ = 5609856.

The previous prime is 21037061. The next prime is 21037103. The reversal of 21037080 is 8073012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87535 + ... + 87774.

Almost surely, 2^21037080 is an apocalyptic number.

21037080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21037080 is an abundant number, since it is smaller than the sum of its proper divisors (42074520).

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

21037080 is a wasteful number, since it uses less digits than its factorization.

21037080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175323 (or 175319 counting only the distinct ones).

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

The square root of 21037080 is about 4586.6196703019. The cubic root of 21037080 is about 276.0547045525.

The spelling of 21037080 in words is "twenty-one million, thirty-seven thousand, eighty".