19409950650 has 48 divisors (see below), whose sum is σ = 50670194400. Its totient is φ = 4903565760.

The previous prime is 19409950649. The next prime is 19409950673. The reversal of 19409950650 is 5605990491.

It is a self number, because there is not a number n which added to its sum of digits gives 19409950650.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3402405 + ... + 3408104.

It is an arithmetic number, because the mean of its divisors is an integer number (1055629050).

Almost surely, 2^19409950650 is an apocalyptic number.

19409950650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19409950650 is an abundant number, since it is smaller than the sum of its proper divisors (31260243750).

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

19409950650 is a wasteful number, since it uses less digits than its factorization.

19409950650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810543 (or 6810538 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 48.

The spelling of 19409950650 in words is "nineteen billion, four hundred nine million, nine hundred fifty thousand, six hundred fifty".