21853352 has 8 divisors (see below), whose sum is σ = 40975050. Its totient is φ = 10926672.

The previous prime is 21853343. The next prime is 21853373. The reversal of 21853352 is 25335812.

It can be written as a sum of positive squares in only one way, i.e., 21771556 + 81796 = 4666^2 + 286^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365827 + ... + 1365842.

Almost surely, 2^21853352 is an apocalyptic number.

It is an amenable number.

21853352 is a deficient number, since it is larger than the sum of its proper divisors (19121698).

21853352 is a wasteful number, since it uses less digits than its factorization.

21853352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731675 (or 2731671 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 21853352 is about 4674.7568920747. The cubic root of 21853352 is about 279.5799483916.

The spelling of 21853352 in words is "twenty-one million, eight hundred fifty-three thousand, three hundred fifty-two".