19105500531 has 24 divisors (see below), whose sum is σ = 27868718640. Its totient is φ = 11635992576.

The previous prime is 19105500529. The next prime is 19105500553. The reversal of 19105500531 is 13500550191.

It is not a de Polignac number, because 19105500531 - 2¹ = 19105500529 is a prime.

It is a super-2 number, since 2×19105500531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19105504531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145066 + ... + 243423.

It is an arithmetic number, because the mean of its divisors is an integer number (1161196610).

Almost surely, 2^19105500531 is an apocalyptic number.

19105500531 is a deficient number, since it is larger than the sum of its proper divisors (8763218109).

19105500531 is a wasteful number, since it uses less digits than its factorization.

19105500531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388615 (or 388602 counting only the distinct ones).

The product of its (nonzero) digits is 3375, while the sum is 30.

The spelling of 19105500531 in words is "nineteen billion, one hundred five million, five hundred thousand, five hundred thirty-one".