21601852 has 12 divisors (see below), whose sum is σ = 37837800. Its totient is φ = 10791056.

The previous prime is 21601843. The next prime is 21601861. The reversal of 21601852 is 25810612.

It is an interprime number because it is at equal distance from previous prime (21601843) and next prime (21601861).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4899 + ... + 8197.

It is an arithmetic number, because the mean of its divisors is an integer number (3153150).

Almost surely, 2^21601852 is an apocalyptic number.

It is an amenable number.

21601852 is a deficient number, since it is larger than the sum of its proper divisors (16235948).

21601852 is a wasteful number, since it uses less digits than its factorization.

21601852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4940 (or 4938 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 21601852 is about 4647.7792546549. The cubic root of 21601852 is about 278.5032892546.

The spelling of 21601852 in words is "twenty-one million, six hundred one thousand, eight hundred fifty-two".