21627696 has 40 divisors (see below), whose sum is σ = 56407104. Its totient is φ = 7140160.

The previous prime is 21627679. The next prime is 21627713. The reversal of 21627696 is 69672612.

It is an interprime number because it is at equal distance from previous prime (21627679) and next prime (21627713).

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, 3031 + ... + 7241.

Almost surely, 2^21627696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21627696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28203552).

21627696 is an abundant number, since it is smaller than the sum of its proper divisors (34779408).

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

21627696 is a wasteful number, since it uses less digits than its factorization.

21627696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329 (or 4323 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 21627696 is about 4650.5586761162. The cubic root of 21627696 is about 278.6143101452.

The spelling of 21627696 in words is "twenty-one million, six hundred twenty-seven thousand, six hundred ninety-six".