12820438623 has 16 divisors (see below), whose sum is σ = 17158014720. Its totient is φ = 8514954816.

The previous prime is 12820438573. The next prime is 12820438637. The reversal of 12820438623 is 32683402821.

It is not a de Polignac number, because 12820438623 - 2¹⁴ = 12820422239 is a prime.

It is a super-2 number, since 2×12820438623² (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 (12820438663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1368411 + ... + 1377747.

It is an arithmetic number, because the mean of its divisors is an integer number (1072375920).

Almost surely, 2^12820438623 is an apocalyptic number.

12820438623 is a deficient number, since it is larger than the sum of its proper divisors (4337576097).

12820438623 is a wasteful number, since it uses less digits than its factorization.

12820438623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006.

The product of its (nonzero) digits is 110592, while the sum is 39.

The spelling of 12820438623 in words is "twelve billion, eight hundred twenty million, four hundred thirty-eight thousand, six hundred twenty-three".