21316068 has 24 divisors (see below), whose sum is σ = 55264160. Its totient is φ = 7105320.

The previous prime is 21316063. The next prime is 21316091. The reversal of 21316068 is 86061312.

21316068 is a `hidden beast` number, since 21 + 31 + 606 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21316063) 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, 98578 + ... + 98793.

Almost surely, 2^21316068 is an apocalyptic number.

It is an amenable number.

21316068 is an abundant number, since it is smaller than the sum of its proper divisors (33948092).

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

21316068 is a wasteful number, since it uses less digits than its factorization.

21316068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197384 (or 197376 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 21316068 is about 4616.9327480482. The cubic root of 21316068 is about 277.2696700876.

The spelling of 21316068 in words is "twenty-one million, three hundred sixteen thousand, sixty-eight".