15000000012 has 48 divisors (see below), whose sum is σ = 39252366720. Its totient is φ = 4953267216.

The previous prime is 15000000007. The next prime is 15000000013. The reversal of 15000000012 is 21000000051.

It is a happy number.

15000000012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 14999999940 and 15000000003.

It is not an unprimeable number, because it can be changed into a prime (15000000013) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 637458 + ... + 660569.

It is an arithmetic number, because the mean of its divisors is an integer number (817757640).

Almost surely, 2^15000000012 is an apocalyptic number.

15000000012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15000000012 is an abundant number, since it is smaller than the sum of its proper divisors (24252366708).

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

15000000012 is a wasteful number, since it uses less digits than its factorization.

15000000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298147 (or 1298139 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

Adding to 15000000012 its reverse (21000000051), we get a palindrome (36000000063).

The spelling of 15000000012 in words is "fifteen billion, twelve", and thus it is an aban number and an uban number.