21632450 has 48 divisors (see below), whose sum is σ = 48419520. Its totient is φ = 7024320.

The previous prime is 21632447. The next prime is 21632459. The reversal of 21632450 is 5423612.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5024 + ... + 8276.

It is an arithmetic number, because the mean of its divisors is an integer number (1008740).

Almost surely, 2^21632450 is an apocalyptic number.

21632450 is an abundant number, since it is smaller than the sum of its proper divisors (26787070).

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

21632450 is a wasteful number, since it uses less digits than its factorization.

21632450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291 (or 3286 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 21632450 is about 4651.0697694186. The cubic root of 21632450 is about 278.6347227895.

It can be divided in two parts, 21632 and 450, that multiplied together give a square (9734400 = 3120²).

The spelling of 21632450 in words is "twenty-one million, six hundred thirty-two thousand, four hundred fifty".