12939730650 has 288 divisors, whose sum is σ = 44518900608. Its totient is φ = 2615846400.

The previous prime is 12939730649. The next prime is 12939730651. The reversal of 12939730650 is 5603793921.

12939730650 is a `hidden beast` number, since 1 + 293 + 9 + 7 + 306 + 50 = 666.

It is an interprime number because it is at equal distance from previous prime (12939730649) and next prime (12939730651).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 12939730596 and 12939730605.

It is not an unprimeable number, because it can be changed into a prime (12939730651) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1277004 + ... + 1287096.

It is an arithmetic number, because the mean of its divisors is an integer number (154579516).

Almost surely, 2^12939730650 is an apocalyptic number.

12939730650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12939730650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22259450304).

12939730650 is an abundant number, since it is smaller than the sum of its proper divisors (31579169958).

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

12939730650 is a wasteful number, since it uses less digits than its factorization.

12939730650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10166 (or 10158 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The spelling of 12939730650 in words is "twelve billion, nine hundred thirty-nine million, seven hundred thirty thousand, six hundred fifty".