12138680802 has 32 divisors (see below), whose sum is σ = 24505005888. Its totient is φ = 4008324096.

The previous prime is 12138680759. The next prime is 12138680809. The reversal of 12138680802 is 20808683121.

It is a super-2 number, since 2×12138680802² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12138680809) 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, 1815738 + ... + 1822410.

It is an arithmetic number, because the mean of its divisors is an integer number (765781434).

Almost surely, 2^12138680802 is an apocalyptic number.

12138680802 is an abundant number, since it is smaller than the sum of its proper divisors (12366325086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12138680802 is a wasteful number, since it uses less digits than its factorization.

12138680802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474.

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 12138680802 in words is "twelve billion, one hundred thirty-eight million, six hundred eighty thousand, eight hundred two".