21796630 has 16 divisors (see below), whose sum is σ = 39708144. Its totient is φ = 8613280.

The previous prime is 21796613. The next prime is 21796631. The reversal of 21796630 is 3669712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796631) 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, 12301 + ... + 13960.

It is an arithmetic number, because the mean of its divisors is an integer number (2481759).

Almost surely, 2^21796630 is an apocalyptic number.

21796630 is a deficient number, since it is larger than the sum of its proper divisors (17911514).

21796630 is a wasteful number, since it uses less digits than its factorization.

21796630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26351.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 21796630 is about 4668.6861106740. The cubic root of 21796630 is about 279.3378486266.

The spelling of 21796630 in words is "twenty-one million, seven hundred ninety-six thousand, six hundred thirty".