12541973823 has 24 divisors (see below), whose sum is σ = 18794285328. Its totient is φ = 8358142464.

The previous prime is 12541973819. The next prime is 12541973833. The reversal of 12541973823 is 32837914521.

It is a happy number.

12541973823 is a `hidden beast` number, since 1 + 254 + 19 + 7 + 382 + 3 = 666.

It is not a de Polignac number, because 12541973823 - 2² = 12541973819 is a prime.

It is a super-2 number, since 2×12541973823² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12541973833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 754065 + ... + 770517.

It is an arithmetic number, because the mean of its divisors is an integer number (783095222).

Almost surely, 2^12541973823 is an apocalyptic number.

12541973823 is a deficient number, since it is larger than the sum of its proper divisors (6252311505).

12541973823 is an equidigital number, since it uses as much as digits as its factorization.

12541973823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19605 (or 19593 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 12541973823 in words is "twelve billion, five hundred forty-one million, nine hundred seventy-three thousand, eight hundred twenty-three".