21882722 has 4 divisors (see below), whose sum is σ = 32824086. Its totient is φ = 10941360.

The previous prime is 21882703. The next prime is 21882739. The reversal of 21882722 is 22728812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13697401 + 8185321 = 3701^2 + 2861^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5470679 + ... + 5470682.

Almost surely, 2^21882722 is an apocalyptic number.

21882722 is a deficient number, since it is larger than the sum of its proper divisors (10941364).

21882722 is a wasteful number, since it uses less digits than its factorization.

21882722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10941363.

The product of its digits is 7168, while the sum is 32.

The square root of 21882722 is about 4677.8971771513. The cubic root of 21882722 is about 279.7051402812.

The spelling of 21882722 in words is "twenty-one million, eight hundred eighty-two thousand, seven hundred twenty-two".