19105403550 has 24 divisors (see below), whose sum is σ = 47381401176. Its totient is φ = 5094774240.

The previous prime is 19105403549. The next prime is 19105403567. The reversal of 19105403550 is 5530450191.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63684529 + ... + 63684828.

It is an arithmetic number, because the mean of its divisors is an integer number (1974225049).

Almost surely, 2^19105403550 is an apocalyptic number.

19105403550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19105403550 is an abundant number, since it is smaller than the sum of its proper divisors (28275997626).

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

19105403550 is a wasteful number, since it uses less digits than its factorization.

19105403550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127369372 (or 127369367 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The spelling of 19105403550 in words is "nineteen billion, one hundred five million, four hundred three thousand, five hundred fifty".