21411763 has 2 divisors, whose sum is σ = 21411764. Its totient is φ = 21411762.

The previous prime is 21411737. The next prime is 21411787. The reversal of 21411763 is 36711412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21411763 - 2¹⁷ = 21280691 is a prime.

It is not a weakly prime, because it can be changed into another prime (21411713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705881 + 10705882.

It is an arithmetic number, because the mean of its divisors is an integer number (10705882).

Almost surely, 2^21411763 is an apocalyptic number.

21411763 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411763 is an equidigital number, since it uses as much as digits as its factorization.

21411763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 21411763 is about 4627.2846249177. The cubic root of 21411763 is about 277.6839696689.

The spelling of 21411763 in words is "twenty-one million, four hundred eleven thousand, seven hundred sixty-three".