22501632 has 72 divisors (see below), whose sum is σ = 60780384. Its totient is φ = 7389184.

The previous prime is 22501631. The next prime is 22501639. The reversal of 22501632 is 23610522.

It is a junction number, because it is equal to n+sod(n) for n = 22501599 and 22501608.

It is not an unprimeable number, because it can be changed into a prime (22501631) 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, 63568 + ... + 63920.

It is an arithmetic number, because the mean of its divisors is an integer number (844172).

Almost surely, 2^22501632 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 22501632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30390192).

22501632 is an abundant number, since it is smaller than the sum of its proper divisors (38278752).

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

22501632 is an equidigital number, since it uses as much as digits as its factorization.

22501632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22501632 is about 4743.5885150380. The cubic root of 22501632 is about 282.3176341473.

The spelling of 22501632 in words is "twenty-two million, five hundred one thousand, six hundred thirty-two".