21276622 has 16 divisors (see below), whose sum is σ = 34618752. Its totient is φ = 9767680.

The previous prime is 21276613. The next prime is 21276623. The reversal of 21276622 is 22667212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21276623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6238 + ... + 9025.

It is an arithmetic number, because the mean of its divisors is an integer number (2163672).

Almost surely, 2^21276622 is an apocalyptic number.

21276622 is a deficient number, since it is larger than the sum of its proper divisors (13342130).

21276622 is a wasteful number, since it uses less digits than its factorization.

21276622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15323.

The product of its digits is 4032, while the sum is 28.

The square root of 21276622 is about 4612.6588861523. The cubic root of 21276622 is about 277.0985326327.

The spelling of 21276622 in words is "twenty-one million, two hundred seventy-six thousand, six hundred twenty-two".