21841852 has 12 divisors (see below), whose sum is σ = 38276056. Its totient is φ = 10905840.

The previous prime is 21841829. The next prime is 21841861. The reversal of 21841852 is 25814812.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123 + ... + 6610.

Almost surely, 2^21841852 is an apocalyptic number.

It is an amenable number.

21841852 is a deficient number, since it is larger than the sum of its proper divisors (16434204).

21841852 is a wasteful number, since it uses less digits than its factorization.

21841852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7548 (or 7546 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 21841852 is about 4673.5267197268. The cubic root of 21841852 is about 279.5308981963.

The spelling of 21841852 in words is "twenty-one million, eight hundred forty-one thousand, eight hundred fifty-two".