21845352 has 32 divisors (see below), whose sum is σ = 56498400. Its totient is φ = 7030464.

The previous prime is 21845311. The next prime is 21845353. The reversal of 21845352 is 25354812.

It is not an unprimeable number, because it can be changed into a prime (21845353) 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, 14998 + ... + 16389.

It is an arithmetic number, because the mean of its divisors is an integer number (1765575).

Almost surely, 2^21845352 is an apocalyptic number.

It is an amenable number.

21845352 is an abundant number, since it is smaller than the sum of its proper divisors (34653048).

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

21845352 is a wasteful number, since it uses less digits than its factorization.

21845352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31425 (or 31421 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 21845352 is about 4673.9011542821. The cubic root of 21845352 is about 279.5458283388.

The spelling of 21845352 in words is "twenty-one million, eight hundred forty-five thousand, three hundred fifty-two".