21068270 has 16 divisors (see below), whose sum is σ = 40153968. Its totient is φ = 7931520.

The previous prime is 21068263. The next prime is 21068291. The reversal of 21068270 is 7286012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61796 + ... + 62135.

It is an arithmetic number, because the mean of its divisors is an integer number (2509623).

Almost surely, 2^21068270 is an apocalyptic number.

21068270 is a deficient number, since it is larger than the sum of its proper divisors (19085698).

21068270 is a wasteful number, since it uses less digits than its factorization.

21068270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123955.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21068270 is about 4590.0185184812. The cubic root of 21068270 is about 276.1910652791.

The spelling of 21068270 in words is "twenty-one million, sixty-eight thousand, two hundred seventy".