21343401763 has 2 divisors, whose sum is σ = 21343401764. Its totient is φ = 21343401762.

The previous prime is 21343401721. The next prime is 21343401773. The reversal of 21343401763 is 36710434312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21343401763 - 2⁹ = 21343401251 is a prime.

It is not a weakly prime, because it can be changed into another prime (21343401773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671700881 + 10671700882.

It is an arithmetic number, because the mean of its divisors is an integer number (10671700882).

Almost surely, 2^21343401763 is an apocalyptic number.

21343401763 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343401763 is an equidigital number, since it uses as much as digits as its factorization.

21343401763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

The spelling of 21343401763 in words is "twenty-one billion, three hundred forty-three million, four hundred one thousand, seven hundred sixty-three".