21431066013463 has 2 divisors, whose sum is σ = 21431066013464. Its totient is φ = 21431066013462.

The previous prime is 21431066013403. The next prime is 21431066013521. The reversal of 21431066013463 is 36431066013412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21431066013463 - 2²⁹ = 21430529142551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21431066013403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715533006731 + 10715533006732.

It is an arithmetic number, because the mean of its divisors is an integer number (10715533006732).

Almost surely, 2^{21431066013463} is an apocalyptic number.

21431066013463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21431066013463 is an equidigital number, since it uses as much as digits as its factorization.

21431066013463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 21431066013463 in words is "twenty-one trillion, four hundred thirty-one billion, sixty-six million, thirteen thousand, four hundred sixty-three".