12239271854 has 4 divisors (see below), whose sum is σ = 18358907784. Its totient is φ = 6119635926.

The previous prime is 12239271817. The next prime is 12239271871. The reversal of 12239271854 is 45817293221.

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

It is a super-2 number, since 2×12239271854² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3059817962 + ... + 3059817965.

It is an arithmetic number, because the mean of its divisors is an integer number (4589726946).

Almost surely, 2^12239271854 is an apocalyptic number.

12239271854 is a deficient number, since it is larger than the sum of its proper divisors (6119635930).

12239271854 is an equidigital number, since it uses as much as digits as its factorization.

12239271854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6119635929.

The product of its digits is 241920, while the sum is 44.

The spelling of 12239271854 in words is "twelve billion, two hundred thirty-nine million, two hundred seventy-one thousand, eight hundred fifty-four".