21052068 has 24 divisors (see below), whose sum is σ = 49815360. Its totient is φ = 6918240.

The previous prime is 21052063. The next prime is 21052079. The reversal of 21052068 is 86025012.

It is not an unprimeable number, because it can be changed into a prime (21052063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11503 + ... + 13206.

It is an arithmetic number, because the mean of its divisors is an integer number (2075640).

Almost surely, 2^21052068 is an apocalyptic number.

It is an amenable number.

21052068 is an abundant number, since it is smaller than the sum of its proper divisors (28763292).

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

21052068 is a wasteful number, since it uses less digits than its factorization.

21052068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24787 (or 24785 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 21052068 is about 4588.2532624083. The cubic root of 21052068 is about 276.1202479597.

The spelling of 21052068 in words is "twenty-one million, fifty-two thousand, sixty-eight".