21968052 has 24 divisors (see below), whose sum is σ = 52100832. Its totient is φ = 7202400.

The previous prime is 21968003. The next prime is 21968053. The reversal of 21968052 is 25086912.

21968052 is a modest number, since divided by 8052 gives 2196 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21968053) 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 7 ways as a sum of consecutive naturals, for example, 14274 + ... + 15737.

It is an arithmetic number, because the mean of its divisors is an integer number (2170868).

Almost surely, 2^21968052 is an apocalyptic number.

It is an amenable number.

21968052 is an abundant number, since it is smaller than the sum of its proper divisors (30132780).

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

21968052 is a wasteful number, since it uses less digits than its factorization.

21968052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30079 (or 30077 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 21968052 is about 4687.0088542694. The cubic root of 21968052 is about 280.0682316710.

The spelling of 21968052 in words is "twenty-one million, nine hundred sixty-eight thousand, fifty-two".