21634702 has 8 divisors (see below), whose sum is σ = 32936616. Its totient is φ = 10655832.

The previous prime is 21634699. The next prime is 21634729. The reversal of 21634702 is 20743612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80593 + ... + 80860.

It is an arithmetic number, because the mean of its divisors is an integer number (4117077).

Almost surely, 2^21634702 is an apocalyptic number.

21634702 is a deficient number, since it is larger than the sum of its proper divisors (11301914).

21634702 is a wasteful number, since it uses less digits than its factorization.

21634702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161522.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21634702 is about 4651.3118579601. The cubic root of 21634702 is about 278.6443913449.

The spelling of 21634702 in words is "twenty-one million, six hundred thirty-four thousand, seven hundred two".