15020013512 has 48 divisors (see below), whose sum is σ = 32854657500. Its totient is φ = 6418645632.

The previous prime is 15020013509. The next prime is 15020013517. The reversal of 15020013512 is 21531002051.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14668600996 + 351412516 = 121114^2 + 18746^2 .

It is not an unprimeable number, because it can be changed into a prime (15020013517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81914 + ... + 191702.

Almost surely, 2^15020013512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15020013512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16427328750).

15020013512 is an abundant number, since it is smaller than the sum of its proper divisors (17834643988).

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

15020013512 is a wasteful number, since it uses less digits than its factorization.

15020013512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110158 (or 110147 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 15020013512 its reverse (21531002051), we get a palindrome (36551015563).

The spelling of 15020013512 in words is "fifteen billion, twenty million, thirteen thousand, five hundred twelve".