21710696 has 32 divisors (see below), whose sum is σ = 46707840. Its totient is φ = 9267648.

The previous prime is 21710687. The next prime is 21710723. The reversal of 21710696 is 69601712.

It is a happy number.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

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, 17141 + ... + 18363.

It is an arithmetic number, because the mean of its divisors is an integer number (1459620).

Almost surely, 2^21710696 is an apocalyptic number.

It is an amenable number.

21710696 is an abundant number, since it is smaller than the sum of its proper divisors (24997144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21710696 is a wasteful number, since it uses less digits than its factorization.

21710696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553 (or 1549 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 21710696 is about 4659.4737900325. The cubic root of 21710696 is about 278.9702652843.

The spelling of 21710696 in words is "twenty-one million, seven hundred ten thousand, six hundred ninety-six".