21706702 has 8 divisors (see below), whose sum is σ = 34273800. Its totient is φ = 10282104.

The previous prime is 21706693. The next prime is 21706717. The reversal of 21706702 is 20760712.

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, 285577 + ... + 285652.

It is an arithmetic number, because the mean of its divisors is an integer number (4284225).

Almost surely, 2^21706702 is an apocalyptic number.

21706702 is a deficient number, since it is larger than the sum of its proper divisors (12567098).

21706702 is a wasteful number, since it uses less digits than its factorization.

21706702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571250.

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

The square root of 21706702 is about 4659.0451811503. The cubic root of 21706702 is about 278.9531573487.

The spelling of 21706702 in words is "twenty-one million, seven hundred six thousand, seven hundred two".