19934105436 has 72 divisors (see below), whose sum is σ = 60618346880. Its totient is φ = 5395696416.

The previous prime is 19934105431. The next prime is 19934105447. The reversal of 19934105436 is 63450143991.

19934105436 is a `hidden beast` number, since 1 + 9 + 93 + 4 + 10 + 543 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 19934105391 and 19934105400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19934105431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2076886 + ... + 2086461.

Almost surely, 2^19934105436 is an apocalyptic number.

It is an amenable number.

19934105436 is an abundant number, since it is smaller than the sum of its proper divisors (40684241444).

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

19934105436 is a wasteful number, since it uses less digits than its factorization.

19934105436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163383 (or 4163378 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 19934105436 in words is "nineteen billion, nine hundred thirty-four million, one hundred five thousand, four hundred thirty-six".