19434377872 has 160 divisors (see below), whose sum is σ = 48275910144. Its totient is φ = 7373721600.

The previous prime is 19434377843. The next prime is 19434377881. The reversal of 19434377872 is 27877343491.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3822372 + ... + 3827452.

Almost surely, 2^19434377872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19434377872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24137955072).

19434377872 is an abundant number, since it is smaller than the sum of its proper divisors (28841532272).

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

19434377872 is a wasteful number, since it uses less digits than its factorization.

19434377872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217 (or 5211 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 55.

The spelling of 19434377872 in words is "nineteen billion, four hundred thirty-four million, three hundred seventy-seven thousand, eight hundred seventy-two".