21073068 has 24 divisors (see below), whose sum is σ = 54634160. Its totient is φ = 7024320.

The previous prime is 21073051. The next prime is 21073069. The reversal of 21073068 is 86037012.

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 (21073069) 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, 97453 + ... + 97668.

Almost surely, 2^21073068 is an apocalyptic number.

It is an amenable number.

21073068 is an abundant number, since it is smaller than the sum of its proper divisors (33561092).

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

21073068 is a wasteful number, since it uses less digits than its factorization.

21073068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195134 (or 195126 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21073068 is about 4590.5411445711. The cubic root of 21073068 is about 276.2120298884.

The spelling of 21073068 in words is "twenty-one million, seventy-three thousand, sixty-eight".