21848733 has 6 divisors (see below), whose sum is σ = 31559294. Its totient is φ = 14565816.

The previous prime is 21848719. The next prime is 21848737. The reversal of 21848733 is 33784812.

It can be written as a sum of positive squares in only one way, i.e., 12830724 + 9018009 = 3582^2 + 3003^2 .

It is not a de Polignac number, because 21848733 - 2⁹ = 21848221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21848737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1213810 + ... + 1213827.

Almost surely, 2^21848733 is an apocalyptic number.

It is an amenable number.

21848733 is a deficient number, since it is larger than the sum of its proper divisors (9710561).

21848733 is a wasteful number, since it uses less digits than its factorization.

21848733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427643 (or 2427640 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 21848733 is about 4674.2628295807. The cubic root of 21848733 is about 279.5602493423.

The spelling of 21848733 in words is "twenty-one million, eight hundred forty-eight thousand, seven hundred thirty-three".