19181941359 has 48 divisors (see below), whose sum is σ = 31669747200. Its totient is φ = 10267399296.

The previous prime is 19181941357. The next prime is 19181941399. The reversal of 19181941359 is 95314918191.

It is not a de Polignac number, because 19181941359 - 2¹ = 19181941357 is a prime.

It is a super-2 number, since 2×19181941359² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19181941351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209994 + ... + 287160.

It is an arithmetic number, because the mean of its divisors is an integer number (659786400).

Almost surely, 2^19181941359 is an apocalyptic number.

19181941359 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19181941359 is a deficient number, since it is larger than the sum of its proper divisors (12487805841).

19181941359 is a wasteful number, since it uses less digits than its factorization.

19181941359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77292 (or 77285 counting only the distinct ones).

The product of its digits is 349920, while the sum is 51.

The spelling of 19181941359 in words is "nineteen billion, one hundred eighty-one million, nine hundred forty-one thousand, three hundred fifty-nine".