21463748997269 has 4 divisors (see below), whose sum is σ = 21467566137696. Its totient is φ = 21459931856844.

The previous prime is 21463748997233. The next prime is 21463748997277. The reversal of 21463748997269 is 96279984736412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21463748997269 - 2²⁸ = 21463480561813 is a prime.

It is a super-2 number, since 2×21463748997269² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21463748997269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463748937269) 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, 1908561779 + ... + 1908573024.

It is an arithmetic number, because the mean of its divisors is an integer number (5366891534424).

Almost surely, 2^{21463748997269} is an apocalyptic number.

It is an amenable number.

21463748997269 is a deficient number, since it is larger than the sum of its proper divisors (3817140427).

21463748997269 is an equidigital number, since it uses as much as digits as its factorization.

21463748997269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3817140426.

The product of its digits is 1975228416, while the sum is 77.

The spelling of 21463748997269 in words is "twenty-one trillion, four hundred sixty-three billion, seven hundred forty-eight million, nine hundred ninety-seven thousand, two hundred sixty-nine".