12047154636 has 96 divisors (see below), whose sum is σ = 32185133568. Its totient is φ = 3471592960.

The previous prime is 12047154629. The next prime is 12047154643. The reversal of 12047154636 is 63645174021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12047154629) and next prime (12047154643).

It is a junction number, because it is equal to n+sod(n) for n = 12047154594 and 12047154603.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 513760 + ... + 536696.

It is an arithmetic number, because the mean of its divisors is an integer number (335261808).

Almost surely, 2^12047154636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12047154636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16092566784).

12047154636 is an abundant number, since it is smaller than the sum of its proper divisors (20137978932).

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

12047154636 is a wasteful number, since it uses less digits than its factorization.

12047154636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23151 (or 23149 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 12047154636 in words is "twelve billion, forty-seven million, one hundred fifty-four thousand, six hundred thirty-six".