21827753 has 2 divisors, whose sum is σ = 21827754. Its totient is φ = 21827752.

The previous prime is 21827723. The next prime is 21827777. The reversal of 21827753 is 35772812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21827584 + 169 = 4672^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 21827753 - 2⁸ = 21827497 is a prime.

It is not a weakly prime, because it can be changed into another prime (21827723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10913876 + 10913877.

It is an arithmetic number, because the mean of its divisors is an integer number (10913877).

Almost surely, 2^21827753 is an apocalyptic number.

It is an amenable number.

21827753 is a deficient number, since it is larger than the sum of its proper divisors (1).

21827753 is an equidigital number, since it uses as much as digits as its factorization.

21827753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 21827753 is about 4672.0180864376. The cubic root of 21827753 is about 279.4707391579.

The spelling of 21827753 in words is "twenty-one million, eight hundred twenty-seven thousand, seven hundred fifty-three".