12138510896 has 20 divisors (see below), whose sum is σ = 23662654392. Its totient is φ = 6032019456.

The previous prime is 12138510887. The next prime is 12138510899. The reversal of 12138510896 is 69801583121.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12138510899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2324561 + ... + 2329776.

Almost surely, 2^12138510896 is an apocalyptic number.

12138510896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12138510896 is a deficient number, since it is larger than the sum of its proper divisors (11524143496).

12138510896 is a wasteful number, since it uses less digits than its factorization.

12138510896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654508 (or 4654502 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 12138510896 in words is "twelve billion, one hundred thirty-eight million, five hundred ten thousand, eight hundred ninety-six".