21622136 has 16 divisors (see below), whose sum is σ = 40613400. Its totient is φ = 10791904.

The previous prime is 21622123. The next prime is 21622141. The reversal of 21622136 is 63122612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3155 + ... + 7293.

Almost surely, 2^21622136 is an apocalyptic number.

It is an amenable number.

21622136 is a deficient number, since it is larger than the sum of its proper divisors (18991264).

21622136 is a wasteful number, since it uses less digits than its factorization.

21622136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798 (or 4794 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 21622136 is about 4649.9608600503. The cubic root of 21622136 is about 278.5904329166.

Adding to 21622136 its reverse (63122612), we get a palindrome (84744748).

The spelling of 21622136 in words is "twenty-one million, six hundred twenty-two thousand, one hundred thirty-six".