19741981519 has 32 divisors (see below), whose sum is σ = 21825619200. Its totient is φ = 17747009280.

The previous prime is 19741981499. The next prime is 19741981537. The reversal of 19741981519 is 91518914791.

It is not a de Polignac number, because 19741981519 - 2²⁵ = 19708427087 is a prime.

It is a super-2 number, since 2×19741981519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19741981519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19741981219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47116692 + ... + 47117110.

It is an arithmetic number, because the mean of its divisors is an integer number (682050600).

Almost surely, 2^19741981519 is an apocalyptic number.

19741981519 is a deficient number, since it is larger than the sum of its proper divisors (2083637681).

19741981519 is a wasteful number, since it uses less digits than its factorization.

19741981519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015.

The product of its digits is 816480, while the sum is 55.

The spelling of 19741981519 in words is "nineteen billion, seven hundred forty-one million, nine hundred eighty-one thousand, five hundred nineteen".