19211939384 has 32 divisors (see below), whose sum is σ = 40211043840. Its totient is φ = 8529612000.

The previous prime is 19211939359. The next prime is 19211939389. The reversal of 19211939384 is 48393911291.

It is a super-2 number, since 2×19211939384² (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 (19211939389) 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 7 ways as a sum of consecutive naturals, for example, 2534792 + ... + 2542359.

It is an arithmetic number, because the mean of its divisors is an integer number (1256595120).

Almost surely, 2^19211939384 is an apocalyptic number.

It is an amenable number.

19211939384 is an abundant number, since it is smaller than the sum of its proper divisors (20999104456).

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

19211939384 is a wasteful number, since it uses less digits than its factorization.

19211939384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077211 (or 5077207 counting only the distinct ones).

The product of its digits is 419904, while the sum is 50.

The spelling of 19211939384 in words is "nineteen billion, two hundred eleven million, nine hundred thirty-nine thousand, three hundred eighty-four".