21752383 has 2 divisors, whose sum is σ = 21752384. Its totient is φ = 21752382.

The previous prime is 21752371. The next prime is 21752429. The reversal of 21752383 is 38325712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21752383 - 2²¹ = 19655231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21752303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10876191 + 10876192.

It is an arithmetic number, because the mean of its divisors is an integer number (10876192).

Almost surely, 2^21752383 is an apocalyptic number.

21752383 is a deficient number, since it is larger than the sum of its proper divisors (1).

21752383 is an equidigital number, since it uses as much as digits as its factorization.

21752383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 21752383 is about 4663.9450039639. The cubic root of 21752383 is about 279.1487026484.

The spelling of 21752383 in words is "twenty-one million, seven hundred fifty-two thousand, three hundred eighty-three".