12930208138 has 4 divisors (see below), whose sum is σ = 19395312210. Its totient is φ = 6465104068.

The previous prime is 12930208129. The next prime is 12930208153. The reversal of 12930208138 is 83180203921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83180203921 = 43 ⋅1934423347.

It can be written as a sum of positive squares in only one way, i.e., 11450498049 + 1479710089 = 107007^2 + 38467^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12930208097 and 12930208106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232552033 + ... + 3232552036.

Almost surely, 2^12930208138 is an apocalyptic number.

12930208138 is a deficient number, since it is larger than the sum of its proper divisors (6465104072).

12930208138 is an equidigital number, since it uses as much as digits as its factorization.

12930208138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6465104071.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 12930208138 in words is "twelve billion, nine hundred thirty million, two hundred eight thousand, one hundred thirty-eight".