12320402523 has 32 divisors (see below), whose sum is σ = 19498117632. Its totient is φ = 6821452800.

The previous prime is 12320402449. The next prime is 12320402551. The reversal of 12320402523 is 32520402321.

It is not a de Polignac number, because 12320402523 - 2¹⁷ = 12320271451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12320402493 and 12320402502.

It is not an unprimeable number, because it can be changed into a prime (12320402623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106423 + ... + 189648.

It is an arithmetic number, because the mean of its divisors is an integer number (609316176).

Almost surely, 2^12320402523 is an apocalyptic number.

12320402523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12320402523 is a deficient number, since it is larger than the sum of its proper divisors (7177715109).

12320402523 is a wasteful number, since it uses less digits than its factorization.

12320402523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296195.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 12320402523 its reverse (32520402321), we get a palindrome (44840804844).

The spelling of 12320402523 in words is "twelve billion, three hundred twenty million, four hundred two thousand, five hundred twenty-three".