21364726 has 16 divisors (see below), whose sum is σ = 32748480. Its totient is φ = 10450440.

The previous prime is 21364709. The next prime is 21364727. The reversal of 21364726 is 62746312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38785 + ... + 39331.

It is an arithmetic number, because the mean of its divisors is an integer number (2046780).

Almost surely, 2^21364726 is an apocalyptic number.

21364726 is a deficient number, since it is larger than the sum of its proper divisors (11383754).

21364726 is a wasteful number, since it uses less digits than its factorization.

21364726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its digits is 12096, while the sum is 31.

The square root of 21364726 is about 4622.1992600925. The cubic root of 21364726 is about 277.4804834366.

The spelling of 21364726 in words is "twenty-one million, three hundred sixty-four thousand, seven hundred twenty-six".