21037479 has 16 divisors (see below), whose sum is σ = 29376000. Its totient is φ = 13366496.

The previous prime is 21037477. The next prime is 21037487. The reversal of 21037479 is 97473012.

It is not a de Polignac number, because 21037479 - 2¹ = 21037477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21037477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34822 + ... + 35420.

It is an arithmetic number, because the mean of its divisors is an integer number (1836000).

Almost surely, 2^21037479 is an apocalyptic number.

21037479 is a deficient number, since it is larger than the sum of its proper divisors (8338521).

21037479 is a wasteful number, since it uses less digits than its factorization.

21037479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 21037479 is about 4586.6631661808. The cubic root of 21037479 is about 276.0564498063.

The spelling of 21037479 in words is "twenty-one million, thirty-seven thousand, four hundred seventy-nine".