19338542550 has 36 divisors (see below), whose sum is σ = 51956218860. Its totient is φ = 5156944560.

The previous prime is 19338542539. The next prime is 19338542557. The reversal of 19338542550 is 5524583391.

19338542550 is a `hidden beast` number, since 1 + 93 + 3 + 8 + 5 + 4 + 2 + 550 = 666.

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 = 19338542496 and 19338542505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19338542557) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 21486820 + ... + 21487719.

Almost surely, 2^19338542550 is an apocalyptic number.

19338542550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19338542550 is an abundant number, since it is smaller than the sum of its proper divisors (32617676310).

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

19338542550 is a wasteful number, since it uses less digits than its factorization.

19338542550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42974557 (or 42974549 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 19338542550 in words is "nineteen billion, three hundred thirty-eight million, five hundred forty-two thousand, five hundred fifty".