12023146540 has 48 divisors (see below), whose sum is σ = 26145161280. Its totient is φ = 4638816000.

The previous prime is 12023146529. The next prime is 12023146567. The reversal of 12023146540 is 4564132021.

It is a junction number, because it is equal to n+sod(n) for n = 12023146499 and 12023146508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606790 + ... + 626290.

It is an arithmetic number, because the mean of its divisors is an integer number (544690860).

Almost surely, 2^12023146540 is an apocalyptic number.

12023146540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12023146540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13072580640).

12023146540 is an abundant number, since it is smaller than the sum of its proper divisors (14122014740).

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

12023146540 is a wasteful number, since it uses less digits than its factorization.

12023146540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20602 (or 20600 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 12023146540 its reverse (4564132021), we get a palindrome (16587278561).

The spelling of 12023146540 in words is "twelve billion, twenty-three million, one hundred forty-six thousand, five hundred forty".