21074713 has 16 divisors (see below), whose sum is σ = 24494400. Its totient is φ = 17920000.

The previous prime is 21074689. The next prime is 21074737. The reversal of 21074713 is 31747012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21074689) and next prime (21074737).

It is a cyclic number.

It is not a de Polignac number, because 21074713 - 2⁵ = 21074681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21074813) 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, 46713 + ... + 47161.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^21074713 is an apocalyptic number.

It is an amenable number.

21074713 is a deficient number, since it is larger than the sum of its proper divisors (3419687).

21074713 is a wasteful number, since it uses less digits than its factorization.

21074713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 21074713 is about 4590.7203138505. The cubic root of 21074713 is about 276.2192168971.

The spelling of 21074713 in words is "twenty-one million, seventy-four thousand, seven hundred thirteen".