21037084 has 12 divisors (see below), whose sum is σ = 36868608. Its totient is φ = 10503200.

The previous prime is 21037061. The next prime is 21037103. The reversal of 21037084 is 48073012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412 + ... + 6499.

It is an arithmetic number, because the mean of its divisors is an integer number (3072384).

Almost surely, 2^21037084 is an apocalyptic number.

It is an amenable number.

21037084 is a deficient number, since it is larger than the sum of its proper divisors (15831524).

21037084 is a wasteful number, since it uses less digits than its factorization.

21037084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7676 (or 7674 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 21037084 is about 4586.6201063528. The cubic root of 21037084 is about 276.0547220489.

The spelling of 21037084 in words is "twenty-one million, thirty-seven thousand, eighty-four".