21452710 has 16 divisors (see below), whose sum is σ = 40647600. Its totient is φ = 8129376.

The previous prime is 21452701. The next prime is 21452731. The reversal of 21452710 is 1725412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56265 + ... + 56644.

It is an arithmetic number, because the mean of its divisors is an integer number (2540475).

Almost surely, 2^21452710 is an apocalyptic number.

21452710 is a deficient number, since it is larger than the sum of its proper divisors (19194890).

21452710 is a wasteful number, since it uses less digits than its factorization.

21452710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112935.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 21452710 is about 4631.7070287314. The cubic root of 21452710 is about 277.8608675286.

The spelling of 21452710 in words is "twenty-one million, four hundred fifty-two thousand, seven hundred ten".