21622452 has 12 divisors (see below), whose sum is σ = 50452416. Its totient is φ = 7207480.

The previous prime is 21622427. The next prime is 21622459. The reversal of 21622452 is 25422612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21622459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900924 + ... + 900947.

It is an arithmetic number, because the mean of its divisors is an integer number (4204368).

Almost surely, 2^21622452 is an apocalyptic number.

It is an amenable number.

21622452 is an abundant number, since it is smaller than the sum of its proper divisors (28829964).

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

21622452 is a wasteful number, since it uses less digits than its factorization.

21622452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801878 (or 1801876 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 21622452 is about 4649.9948387068. The cubic root of 21622452 is about 278.5917900774.

The spelling of 21622452 in words is "twenty-one million, six hundred twenty-two thousand, four hundred fifty-two".