21896662 has 4 divisors (see below), whose sum is σ = 32844996. Its totient is φ = 10948330.

The previous prime is 21896639. The next prime is 21896669. The reversal of 21896662 is 26669812.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21896669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5474164 + ... + 5474167.

It is an arithmetic number, because the mean of its divisors is an integer number (8211249).

Almost surely, 2^21896662 is an apocalyptic number.

21896662 is a deficient number, since it is larger than the sum of its proper divisors (10948334).

21896662 is a wasteful number, since it uses less digits than its factorization.

21896662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10948333.

The product of its digits is 62208, while the sum is 40.

The square root of 21896662 is about 4679.3869256560. The cubic root of 21896662 is about 279.7645214070.

The spelling of 21896662 in words is "twenty-one million, eight hundred ninety-six thousand, six hundred sixty-two".