12020137520 has 20 divisors (see below), whose sum is σ = 27946819920. Its totient is φ = 4808054976.

The previous prime is 12020137517. The next prime is 12020137543. The reversal of 12020137520 is 2573102021.

It is a happy number.

12020137520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75125780 + ... + 75125939.

It is an arithmetic number, because the mean of its divisors is an integer number (1397340996).

Almost surely, 2^12020137520 is an apocalyptic number.

12020137520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020137520 is an abundant number, since it is smaller than the sum of its proper divisors (15926682400).

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

12020137520 is a wasteful number, since it uses less digits than its factorization.

12020137520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150251732 (or 150251726 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

Adding to 12020137520 its reverse (2573102021), we get a palindrome (14593239541).

The spelling of 12020137520 in words is "twelve billion, twenty million, one hundred thirty-seven thousand, five hundred twenty".