19381940404 has 24 divisors (see below), whose sum is σ = 35024315648. Its totient is φ = 9375203520.

The previous prime is 19381940393. The next prime is 19381940411. The reversal of 19381940404 is 40404918391.

It is a super-2 number, since 2×19381940404² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367504 + ... + 416920.

Almost surely, 2^19381940404 is an apocalyptic number.

It is an amenable number.

19381940404 is a deficient number, since it is larger than the sum of its proper divisors (15642375244).

19381940404 is a wasteful number, since it uses less digits than its factorization.

19381940404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52615 (or 52613 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 19381940404 in words is "nineteen billion, three hundred eighty-one million, nine hundred forty thousand, four hundred four".