12535444020 has 192 divisors, whose sum is σ = 40939831296. Its totient is φ = 2832107520.

The previous prime is 12535443989. The next prime is 12535444073. The reversal of 12535444020 is 2044453521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1150237 + ... + 1161083.

It is an arithmetic number, because the mean of its divisors is an integer number (213228288).

Almost surely, 2^12535444020 is an apocalyptic number.

12535444020 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 12535444020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20469915648).

12535444020 is an abundant number, since it is smaller than the sum of its proper divisors (28404387276).

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

12535444020 is a wasteful number, since it uses less digits than its factorization.

12535444020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990 (or 10988 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 12535444020 its reverse (2044453521), we get a palindrome (14579897541).

The spelling of 12535444020 in words is "twelve billion, five hundred thirty-five million, four hundred forty-four thousand, twenty".