21302068 has 12 divisors (see below), whose sum is σ = 37910880. Its totient is φ = 10470392.

The previous prime is 21302063. The next prime is 21302081. The reversal of 21302068 is 86020312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44896 + ... + 45367.

It is an arithmetic number, because the mean of its divisors is an integer number (3159240).

Almost surely, 2^21302068 is an apocalyptic number.

It is an amenable number.

21302068 is a deficient number, since it is larger than the sum of its proper divisors (16608812).

21302068 is a wasteful number, since it uses less digits than its factorization.

21302068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90326 (or 90324 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21302068 is about 4615.4163409166. The cubic root of 21302068 is about 277.2089549263.

The spelling of 21302068 in words is "twenty-one million, three hundred two thousand, sixty-eight".