21446452 has 12 divisors (see below), whose sum is σ = 39739140. Its totient is φ = 10092416.

The previous prime is 21446443. The next prime is 21446461. The reversal of 21446452 is 25464412.

It is an interprime number because it is at equal distance from previous prime (21446443) and next prime (21446461).

It can be written as a sum of positive squares in 2 ways, for example, as 9084196 + 12362256 = 3014^2 + 3516^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21446452.

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, 157627 + ... + 157762.

It is an arithmetic number, because the mean of its divisors is an integer number (3311595).

Almost surely, 2^21446452 is an apocalyptic number.

It is an amenable number.

21446452 is a deficient number, since it is larger than the sum of its proper divisors (18292688).

21446452 is a wasteful number, since it uses less digits than its factorization.

21446452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315410 (or 315408 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 21446452 is about 4631.0314185935. The cubic root of 21446452 is about 277.8338465071.

The spelling of 21446452 in words is "twenty-one million, four hundred forty-six thousand, four hundred fifty-two".