21753352 has 8 divisors (see below), whose sum is σ = 40787550. Its totient is φ = 10876672.

The previous prime is 21753349. The next prime is 21753367. The reversal of 21753352 is 25335712.

It can be written as a sum of positive squares in only one way, i.e., 21659716 + 93636 = 4654^2 + 306^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21753352.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1359577 + ... + 1359592.

Almost surely, 2^21753352 is an apocalyptic number.

It is an amenable number.

21753352 is a deficient number, since it is larger than the sum of its proper divisors (19034198).

21753352 is a wasteful number, since it uses less digits than its factorization.

21753352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719175 (or 2719171 counting only the distinct ones).

The product of its digits is 6300, while the sum is 28.

The square root of 21753352 is about 4664.0488848210. The cubic root of 21753352 is about 279.1528476514.

The spelling of 21753352 in words is "twenty-one million, seven hundred fifty-three thousand, three hundred fifty-two".