12054991988 has 12 divisors (see below), whose sum is σ = 22719023460. Its totient is φ = 5563842432.

The previous prime is 12054991981. The next prime is 12054992011. The reversal of 12054991988 is 88919945021.

It can be written as a sum of positive squares in 2 ways, for example, as 7682873104 + 4372118884 = 87652^2 + 66122^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12054991981) 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, 115913333 + ... + 115913436.

It is an arithmetic number, because the mean of its divisors is an integer number (1893251955).

Almost surely, 2^12054991988 is an apocalyptic number.

It is an amenable number.

12054991988 is a deficient number, since it is larger than the sum of its proper divisors (10664031472).

12054991988 is a wasteful number, since it uses less digits than its factorization.

12054991988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231826786 (or 231826784 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 56.

The spelling of 12054991988 in words is "twelve billion, fifty-four million, nine hundred ninety-one thousand, nine hundred eighty-eight".