15205868140 has 12 divisors (see below), whose sum is σ = 31932323136. Its totient is φ = 6082347248.

The previous prime is 15205868137. The next prime is 15205868177. The reversal of 15205868140 is 4186850251.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15205868093 and 15205868102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380146684 + ... + 380146723.

It is an arithmetic number, because the mean of its divisors is an integer number (2661026928).

Almost surely, 2^15205868140 is an apocalyptic number.

15205868140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15205868140 is an abundant number, since it is smaller than the sum of its proper divisors (16726454996).

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

15205868140 is a wasteful number, since it uses less digits than its factorization.

15205868140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760293416 (or 760293414 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The spelling of 15205868140 in words is "fifteen billion, two hundred five million, eight hundred sixty-eight thousand, one hundred forty".