12427991952 has 20 divisors (see below), whose sum is σ = 32105646000. Its totient is φ = 4142663968.

The previous prime is 12427991921. The next prime is 12427991981. The reversal of 12427991952 is 25919972421.

It is a junction number, because it is equal to n+sod(n) for n = 12427991895 and 12427991904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129458202 + ... + 129458297.

It is an arithmetic number, because the mean of its divisors is an integer number (1605282300).

Almost surely, 2^12427991952 is an apocalyptic number.

12427991952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12427991952 is an abundant number, since it is smaller than the sum of its proper divisors (19677654048).

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

12427991952 is a wasteful number, since it uses less digits than its factorization.

12427991952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258916510 (or 258916504 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The spelling of 12427991952 in words is "twelve billion, four hundred twenty-seven million, nine hundred ninety-one thousand, nine hundred fifty-two".