21296632 has 32 divisors (see below), whose sum is σ = 46159200. Its totient is φ = 9022464.

The previous prime is 21296617. The next prime is 21296633. The reversal of 21296632 is 23669212.

It is a junction number, because it is equal to n+sod(n) for n = 21296594 and 21296603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21296633) 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, 2848 + ... + 7120.

It is an arithmetic number, because the mean of its divisors is an integer number (1442475).

Almost surely, 2^21296632 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 21296632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23079600).

21296632 is an abundant number, since it is smaller than the sum of its proper divisors (24862568).

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

21296632 is a wasteful number, since it uses less digits than its factorization.

21296632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375 (or 4371 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 21296632 is about 4614.8274073902. The cubic root of 21296632 is about 277.1853729267.

The spelling of 21296632 in words is "twenty-one million, two hundred ninety-six thousand, six hundred thirty-two".