21334772 has 6 divisors (see below), whose sum is σ = 37335858. Its totient is φ = 10667384.

The previous prime is 21334763. The next prime is 21334787. The reversal of 21334772 is 27743312.

It can be written as a sum of positive squares in only one way, i.e., 12418576 + 8916196 = 3524^2 + 2986^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2666843 + ... + 2666850.

It is an arithmetic number, because the mean of its divisors is an integer number (6222643).

Almost surely, 2^21334772 is an apocalyptic number.

It is an amenable number.

21334772 is a deficient number, since it is larger than the sum of its proper divisors (16001086).

21334772 is a wasteful number, since it uses less digits than its factorization.

21334772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333697 (or 5333695 counting only the distinct ones).

The product of its digits is 7056, while the sum is 29.

The square root of 21334772 is about 4618.9578911265. The cubic root of 21334772 is about 277.3507440736.

The spelling of 21334772 in words is "twenty-one million, three hundred thirty-four thousand, seven hundred seventy-two".