21235952 has 20 divisors (see below), whose sum is σ = 41273400. Its totient is φ = 10584768.

The previous prime is 21235933. The next prime is 21235979. The reversal of 21235952 is 25953212.

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, 3683 + ... + 7485.

It is an arithmetic number, because the mean of its divisors is an integer number (2063670).

Almost surely, 2^21235952 is an apocalyptic number.

It is an amenable number.

21235952 is a deficient number, since it is larger than the sum of its proper divisors (20037448).

21235952 is a wasteful number, since it uses less digits than its factorization.

21235952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160 (or 4154 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 21235952 is about 4608.2482572014. The cubic root of 21235952 is about 276.9218632109.

The spelling of 21235952 in words is "twenty-one million, two hundred thirty-five thousand, nine hundred fifty-two".