21868822 has 16 divisors (see below), whose sum is σ = 33541200. Its totient is φ = 10690560.

The previous prime is 21868793. The next prime is 21868831. The reversal of 21868822 is 22886812.

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, 28054 + ... + 28822.

It is an arithmetic number, because the mean of its divisors is an integer number (2096325).

Almost surely, 2^21868822 is an apocalyptic number.

21868822 is a deficient number, since it is larger than the sum of its proper divisors (11672378).

21868822 is a wasteful number, since it uses less digits than its factorization.

21868822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its digits is 24576, while the sum is 37.

The square root of 21868822 is about 4676.4112308479. The cubic root of 21868822 is about 279.6459044308.

The spelling of 21868822 in words is "twenty-one million, eight hundred sixty-eight thousand, eight hundred twenty-two".