21604714 has 8 divisors (see below), whose sum is σ = 32443488. Its totient is φ = 10790220.

The previous prime is 21604699. The next prime is 21604717. The reversal of 21604714 is 41740612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21604717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3652 + ... + 7519.

It is an arithmetic number, because the mean of its divisors is an integer number (4055436).

Almost surely, 2^21604714 is an apocalyptic number.

21604714 is a deficient number, since it is larger than the sum of its proper divisors (10838774).

21604714 is a wasteful number, since it uses less digits than its factorization.

21604714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12140.

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

The square root of 21604714 is about 4648.0871334346. The cubic root of 21604714 is about 278.5155882188.

The spelling of 21604714 in words is "twenty-one million, six hundred four thousand, seven hundred fourteen".