21193852 has 12 divisors (see below), whose sum is σ = 37789416. Its totient is φ = 10396880.

The previous prime is 21193847. The next prime is 21193853. The reversal of 21193852 is 25839112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21193853) 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, 49774 + ... + 50197.

It is an arithmetic number, because the mean of its divisors is an integer number (3149118).

Almost surely, 2^21193852 is an apocalyptic number.

It is an amenable number.

21193852 is a deficient number, since it is larger than the sum of its proper divisors (16595564).

21193852 is a wasteful number, since it uses less digits than its factorization.

21193852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100028 (or 100026 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 21193852 is about 4603.6780947412. The cubic root of 21193852 is about 276.7387441439.

The spelling of 21193852 in words is "twenty-one million, one hundred ninety-three thousand, eight hundred fifty-two".