21706701 has 8 divisors (see below), whose sum is σ = 29615520. Its totient is φ = 14134512.

The previous prime is 21706693. The next prime is 21706717. The reversal of 21706701 is 10760712.

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

It is not a de Polignac number, because 21706701 - 2³ = 21706693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21707701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84006 + ... + 84263.

It is an arithmetic number, because the mean of its divisors is an integer number (3701940).

Almost surely, 2^21706701 is an apocalyptic number.

It is an amenable number.

21706701 is a deficient number, since it is larger than the sum of its proper divisors (7908819).

21706701 is a wasteful number, since it uses less digits than its factorization.

21706701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168315.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 21706701 is about 4659.0450738322. The cubic root of 21706701 is about 278.9531530650.

The spelling of 21706701 in words is "twenty-one million, seven hundred six thousand, seven hundred one".