21068118 has 12 divisors (see below), whose sum is σ = 45647628. Its totient is φ = 7022700.

The previous prime is 21068101. The next prime is 21068149. The reversal of 21068118 is 81186012.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21068091 and 21068100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 585208 + ... + 585243.

It is an arithmetic number, because the mean of its divisors is an integer number (3803969).

Almost surely, 2^21068118 is an apocalyptic number.

21068118 is an abundant number, since it is smaller than the sum of its proper divisors (24579510).

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

21068118 is a wasteful number, since it uses less digits than its factorization.

21068118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170459 (or 1170456 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 21068118 is about 4590.0019607839. The cubic root of 21068118 is about 276.1904010711.

The spelling of 21068118 in words is "twenty-one million, sixty-eight thousand, one hundred eighteen".