12351833138 has 18 divisors (see below), whose sum is σ = 18759510909. Its totient is φ = 6099608592.

The previous prime is 12351833113. The next prime is 12351833159. The reversal of 12351833138 is 83133815321.

It can be written as a sum of positive squares in 2 ways, for example, as 11041175929 + 1310657209 = 105077^2 + 36203^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78587.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13988045 + ... + 13988927.

Almost surely, 2^12351833138 is an apocalyptic number.

12351833138 is a deficient number, since it is larger than the sum of its proper divisors (6407677771).

12351833138 is an frugal number, since it uses more digits than its factorization.

12351833138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 974 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

It can be divided in two parts, 1235183 and 3138, that added together give a palindrome (1238321).

The spelling of 12351833138 in words is "twelve billion, three hundred fifty-one million, eight hundred thirty-three thousand, one hundred thirty-eight".