21492310663 has 2 divisors, whose sum is σ = 21492310664. Its totient is φ = 21492310662.

The previous prime is 21492310603. The next prime is 21492310667. The reversal of 21492310663 is 36601329412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21492310663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21492310667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10746155331 + 10746155332.

It is an arithmetic number, because the mean of its divisors is an integer number (10746155332).

Almost surely, 2^21492310663 is an apocalyptic number.

21492310663 is a deficient number, since it is larger than the sum of its proper divisors (1).

21492310663 is an equidigital number, since it uses as much as digits as its factorization.

21492310663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 21492310663 in words is "twenty-one billion, four hundred ninety-two million, three hundred ten thousand, six hundred sixty-three".