21610696 has 16 divisors (see below), whose sum is σ = 41091840. Its totient is φ = 10652880.

The previous prime is 21610691. The next prime is 21610753. The reversal of 21610696 is 69601612.

It is not an unprimeable number, because it can be changed into a prime (21610691) 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, 18456 + ... + 19591.

It is an arithmetic number, because the mean of its divisors is an integer number (2568240).

Almost surely, 2^21610696 is an apocalyptic number.

It is an amenable number.

21610696 is a deficient number, since it is larger than the sum of its proper divisors (19481144).

21610696 is a wasteful number, since it uses less digits than its factorization.

21610696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38124 (or 38120 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 21610696 is about 4648.7305794163. The cubic root of 21610696 is about 278.5412913517.

The spelling of 21610696 in words is "twenty-one million, six hundred ten thousand, six hundred ninety-six".