21329068 has 12 divisors (see below), whose sum is σ = 37366840. Its totient is φ = 10652832.

The previous prime is 21329051. The next prime is 21329069. The reversal of 21329068 is 86092312.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21329069) 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, 2155 + ... + 6877.

Almost surely, 2^21329068 is an apocalyptic number.

It is an amenable number.

21329068 is a deficient number, since it is larger than the sum of its proper divisors (16037772).

21329068 is a wasteful number, since it uses less digits than its factorization.

21329068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5856 (or 5854 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 21329068 is about 4618.3403945573. The cubic root of 21329068 is about 277.3260246523.

The spelling of 21329068 in words is "twenty-one million, three hundred twenty-nine thousand, sixty-eight".