22021633 has 8 divisors (see below), whose sum is σ = 23085216. Its totient is φ = 20983200.

The previous prime is 22021621. The next prime is 22021639. The reversal of 22021633 is 33612022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22021633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22021633.

It is not an unprimeable number, because it can be changed into a prime (22021639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4483 + ... + 8008.

It is an arithmetic number, because the mean of its divisors is an integer number (2885652).

Almost surely, 2^22021633 is an apocalyptic number.

It is an amenable number.

22021633 is a deficient number, since it is larger than the sum of its proper divisors (1063583).

22021633 is a wasteful number, since it uses less digits than its factorization.

22021633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12575.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 22021633 is about 4692.7212787465. The cubic root of 22021633 is about 280.2957461856.

Adding to 22021633 its reverse (33612022), we get a palindrome (55633655).

The spelling of 22021633 in words is "twenty-two million, twenty-one thousand, six hundred thirty-three".