12840333838 has 4 divisors (see below), whose sum is σ = 19260500760. Its totient is φ = 6420166918.

The previous prime is 12840333833. The next prime is 12840333839. The reversal of 12840333838 is 83833304821.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 12840333794 and 12840333803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840333833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210083458 + ... + 3210083461.

It is an arithmetic number, because the mean of its divisors is an integer number (4815125190).

Almost surely, 2^12840333838 is an apocalyptic number.

12840333838 is a deficient number, since it is larger than the sum of its proper divisors (6420166922).

12840333838 is an equidigital number, since it uses as much as digits as its factorization.

12840333838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6420166921.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 12840333838 in words is "twelve billion, eight hundred forty million, three hundred thirty-three thousand, eight hundred thirty-eight".