12001930978 has 16 divisors (see below), whose sum is σ = 18789770880. Its totient is φ = 5738789056.

The previous prime is 12001930957. The next prime is 12001930979. The reversal of 12001930978 is 87903910021.

It is a self number, because there is not a number n which added to its sum of digits gives 12001930978.

It is not an unprimeable number, because it can be changed into a prime (12001930979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202218 + ... + 254746.

It is an arithmetic number, because the mean of its divisors is an integer number (1174360680).

Almost surely, 2^12001930978 is an apocalyptic number.

12001930978 is a deficient number, since it is larger than the sum of its proper divisors (6787839902).

12001930978 is a wasteful number, since it uses less digits than its factorization.

12001930978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57521.

The product of its (nonzero) digits is 27216, while the sum is 40.

The spelling of 12001930978 in words is "twelve billion, one million, nine hundred thirty thousand, nine hundred seventy-eight".