21814633 has 2 divisors, whose sum is σ = 21814634. Its totient is φ = 21814632.

The previous prime is 21814619. The next prime is 21814703. The reversal of 21814633 is 33641812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20403289 + 1411344 = 4517^2 + 1188^2 .

It is a cyclic number.

It is not a de Polignac number, because 21814633 - 2¹³ = 21806441 is a prime.

It is not a weakly prime, because it can be changed into another prime (21814613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10907316 + 10907317.

It is an arithmetic number, because the mean of its divisors is an integer number (10907317).

Almost surely, 2^21814633 is an apocalyptic number.

It is an amenable number.

21814633 is a deficient number, since it is larger than the sum of its proper divisors (1).

21814633 is an equidigital number, since it uses as much as digits as its factorization.

21814633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 21814633 is about 4670.6137712296. The cubic root of 21814633 is about 279.4147341417.

The spelling of 21814633 in words is "twenty-one million, eight hundred fourteen thousand, six hundred thirty-three".