12020194728 has 96 divisors (see below), whose sum is σ = 33284908800. Its totient is φ = 3917053824.

The previous prime is 12020194723. The next prime is 12020194733. The reversal of 12020194728 is 82749102021.

It is an interprime number because it is at equal distance from previous prime (12020194723) and next prime (12020194733).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12020194692 and 12020194701.

It is not an unprimeable number, because it can be changed into a prime (12020194723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4462150 + ... + 4464842.

It is an arithmetic number, because the mean of its divisors is an integer number (346717800).

Almost surely, 2^12020194728 is an apocalyptic number.

12020194728 is a gapful number since it is divisible by the number (18) 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 12020194728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16642454400).

12020194728 is an abundant number, since it is smaller than the sum of its proper divisors (21264714072).

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

12020194728 is a wasteful number, since it uses less digits than its factorization.

12020194728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4071 (or 4064 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

Adding to 12020194728 its reverse (82749102021), we get a palindrome (94769296749).

The spelling of 12020194728 in words is "twelve billion, twenty million, one hundred ninety-four thousand, seven hundred twenty-eight".