19538114550 has 96 divisors (see below), whose sum is σ = 50507814912. Its totient is φ = 4993591680.

The previous prime is 19538114549. The next prime is 19538114573. The reversal of 19538114550 is 5541183591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 345579 + ... + 398121.

It is an arithmetic number, because the mean of its divisors is an integer number (526123072).

Almost surely, 2^19538114550 is an apocalyptic number.

19538114550 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 19538114550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25253907456).

19538114550 is an abundant number, since it is smaller than the sum of its proper divisors (30969700362).

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

19538114550 is a wasteful number, since it uses less digits than its factorization.

19538114550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52662 (or 52657 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 42.

The spelling of 19538114550 in words is "nineteen billion, five hundred thirty-eight million, one hundred fourteen thousand, five hundred fifty".