12020017830 has 32 divisors (see below), whose sum is σ = 28886005728. Its totient is φ = 3201120000.

The previous prime is 12020017819. The next prime is 12020017859. The reversal of 12020017830 is 3871002021.

It is a self number, because there is not a number n which added to its sum of digits gives 12020017830.

It is a congruent number.

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, 240421 + ... + 286080.

It is an arithmetic number, because the mean of its divisors is an integer number (902687679).

Almost surely, 2^12020017830 is an apocalyptic number.

12020017830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12020017830 is an abundant number, since it is smaller than the sum of its proper divisors (16865987898).

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

12020017830 is a wasteful number, since it uses less digits than its factorization.

12020017830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527272.

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 12020017830 its reverse (3871002021), we get a palindrome (15891019851).

The spelling of 12020017830 in words is "twelve billion, twenty million, seventeen thousand, eight hundred thirty".