21445852 has 6 divisors (see below), whose sum is σ = 37530248. Its totient is φ = 10722924.

The previous prime is 21445847. The next prime is 21445861. The reversal of 21445852 is 25854412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680728 + ... + 2680735.

Almost surely, 2^21445852 is an apocalyptic number.

It is an amenable number.

21445852 is a deficient number, since it is larger than the sum of its proper divisors (16084396).

21445852 is a wasteful number, since it uses less digits than its factorization.

21445852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361467 (or 5361465 counting only the distinct ones).

The product of its digits is 12800, while the sum is 31.

The square root of 21445852 is about 4630.9666377550. The cubic root of 21445852 is about 277.8312555290.

The spelling of 21445852 in words is "twenty-one million, four hundred forty-five thousand, eight hundred fifty-two".