15000000008 has 32 divisors (see below), whose sum is σ = 33179727360. Its totient is φ = 6221197440.

The previous prime is 15000000007. The next prime is 15000000013. The reversal of 15000000008 is 80000000051.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 14999999929 and 15000000001.

It is not an unprimeable number, because it can be changed into a prime (15000000007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4318541 + ... + 4322012.

It is an arithmetic number, because the mean of its divisors is an integer number (1036866480).

Almost surely, 2^15000000008 is an apocalyptic number.

It is an amenable number.

15000000008 is an abundant number, since it is smaller than the sum of its proper divisors (18179727352).

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

15000000008 is a wasteful number, since it uses less digits than its factorization.

15000000008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8640597 (or 8640593 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 15000000008 its reverse (80000000051), we get a palindrome (95000000059).

The spelling of 15000000008 in words is "fifteen billion, eight", and thus it is an aban number and an uban number.