12199705950 has 24 divisors (see below), whose sum is σ = 30255271128. Its totient is φ = 3253254880.

The previous prime is 12199705927. The next prime is 12199705951. The reversal of 12199705950 is 5950799121.

It is a self number, because there is not a number n which added to its sum of digits gives 12199705950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12199705951) 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, 40665537 + ... + 40665836.

It is an arithmetic number, because the mean of its divisors is an integer number (1260636297).

Almost surely, 2^12199705950 is an apocalyptic number.

12199705950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12199705950 is an abundant number, since it is smaller than the sum of its proper divisors (18055565178).

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

12199705950 is a wasteful number, since it uses less digits than its factorization.

12199705950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81331388 (or 81331383 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 48.

The spelling of 12199705950 in words is "twelve billion, one hundred ninety-nine million, seven hundred five thousand, nine hundred fifty".