21695852 has 6 divisors (see below), whose sum is σ = 37967748. Its totient is φ = 10847924.

The previous prime is 21695837. The next prime is 21695879. The reversal of 21695852 is 25859612.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2711978 + ... + 2711985.

It is an arithmetic number, because the mean of its divisors is an integer number (6327958).

Almost surely, 2^21695852 is an apocalyptic number.

It is an amenable number.

21695852 is a deficient number, since it is larger than the sum of its proper divisors (16271896).

21695852 is a wasteful number, since it uses less digits than its factorization.

21695852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423967 (or 5423965 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 21695852 is about 4657.8806339364. The cubic root of 21695852 is about 278.9066717643.

The spelling of 21695852 in words is "twenty-one million, six hundred ninety-five thousand, eight hundred fifty-two".