21933622 has 4 divisors (see below), whose sum is σ = 32900436. Its totient is φ = 10966810.

The previous prime is 21933607. The next prime is 21933623. The reversal of 21933622 is 22633912.

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 (21933623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5483404 + ... + 5483407.

It is an arithmetic number, because the mean of its divisors is an integer number (8225109).

Almost surely, 2^21933622 is an apocalyptic number.

21933622 is a deficient number, since it is larger than the sum of its proper divisors (10966814).

21933622 is a wasteful number, since it uses less digits than its factorization.

21933622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10966813.

The product of its digits is 3888, while the sum is 28.

The square root of 21933622 is about 4683.3344958480. The cubic root of 21933622 is about 279.9218404294.

Multiplying 21933622 by its sum of digits (28), we get a palindrome (614141416).

The spelling of 21933622 in words is "twenty-one million, nine hundred thirty-three thousand, six hundred twenty-two".