21112665430463 has 4 divisors (see below), whose sum is σ = 21470507217480. Its totient is φ = 20754823643448.

The previous prime is 21112665430349. The next prime is 21112665430469. The reversal of 21112665430463 is 36403456621112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21112665430463 - 2¹⁴ = 21112665414079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112665430469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178920893420 + ... + 178920893537.

It is an arithmetic number, because the mean of its divisors is an integer number (5367626804370).

Almost surely, 2^{21112665430463} is an apocalyptic number.

21112665430463 is a deficient number, since it is larger than the sum of its proper divisors (357841787017).

21112665430463 is an equidigital number, since it uses as much as digits as its factorization.

21112665430463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357841787016.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 21112665430463 in words is "twenty-one trillion, one hundred twelve billion, six hundred sixty-five million, four hundred thirty thousand, four hundred sixty-three".