12620837542 has 4 divisors (see below), whose sum is σ = 18931256316. Its totient is φ = 6310418770.

The previous prime is 12620837539. The next prime is 12620837543. The reversal of 12620837542 is 24573802621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24573802621 = 61007 ⋅402803.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12620837495 and 12620837504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12620837543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3155209384 + ... + 3155209387.

It is an arithmetic number, because the mean of its divisors is an integer number (4732814079).

Almost surely, 2^12620837542 is an apocalyptic number.

12620837542 is a deficient number, since it is larger than the sum of its proper divisors (6310418774).

12620837542 is an equidigital number, since it uses as much as digits as its factorization.

12620837542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6310418773.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 12620837542 in words is "twelve billion, six hundred twenty million, eight hundred thirty-seven thousand, five hundred forty-two".