21693796 has 24 divisors (see below), whose sum is σ = 39191936. Its totient is φ = 10501920.

The previous prime is 21693787. The next prime is 21693799. The reversal of 21693796 is 69739612.

It is not an unprimeable number, because it can be changed into a prime (21693799) 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, 15685 + ... + 17011.

Almost surely, 2^21693796 is an apocalyptic number.

It is an amenable number.

21693796 is a deficient number, since it is larger than the sum of its proper divisors (17498140).

21693796 is a wasteful number, since it uses less digits than its factorization.

21693796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459 (or 1457 counting only the distinct ones).

The product of its digits is 122472, while the sum is 43.

The square root of 21693796 is about 4657.6599274743. The cubic root of 21693796 is about 278.8978613208.

The spelling of 21693796 in words is "twenty-one million, six hundred ninety-three thousand, seven hundred ninety-six".