21226814 has 16 divisors (see below), whose sum is σ = 36451296. Its totient is φ = 9081600.

The previous prime is 21226771. The next prime is 21226823. The reversal of 21226814 is 41862212.

It is a happy number.

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, 11474 + ... + 13194.

It is an arithmetic number, because the mean of its divisors is an integer number (2278206).

Almost surely, 2^21226814 is an apocalyptic number.

21226814 is a deficient number, since it is larger than the sum of its proper divisors (15224482).

21226814 is a wasteful number, since it uses less digits than its factorization.

21226814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611.

The product of its digits is 1536, while the sum is 26.

The square root of 21226814 is about 4607.2566674758. The cubic root of 21226814 is about 276.8821369479.

The spelling of 21226814 in words is "twenty-one million, two hundred twenty-six thousand, eight hundred fourteen".