21960252 has 36 divisors (see below), whose sum is σ = 56039256. Its totient is φ = 7250400.

The previous prime is 21960251. The next prime is 21960259. The reversal of 21960252 is 25206912.

21960252 is a `hidden beast` number, since 2 + 1 + 9 + 602 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21960251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002 + ... + 6702.

It is an arithmetic number, because the mean of its divisors is an integer number (1556646).

Almost surely, 2^21960252 is an apocalyptic number.

It is an amenable number.

21960252 is an abundant number, since it is smaller than the sum of its proper divisors (34079004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21960252 is a wasteful number, since it uses less digits than its factorization.

21960252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5818 (or 5813 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 21960252 is about 4686.1766932116. The cubic root of 21960252 is about 280.0350806386.

The spelling of 21960252 in words is "twenty-one million, nine hundred sixty thousand, two hundred fifty-two".