19434984437 has 8 divisors (see below), whose sum is σ = 21457245600. Its totient is φ = 17455297360.

The previous prime is 19434984431. The next prime is 19434984479. The reversal of 19434984437 is 73448943491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19434984437 - 2⁴ = 19434984421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19434984431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10642562 + ... + 10644387.

It is an arithmetic number, because the mean of its divisors is an integer number (2682155700).

Almost surely, 2^19434984437 is an apocalyptic number.

It is an amenable number.

19434984437 is a deficient number, since it is larger than the sum of its proper divisors (2022261163).

19434984437 is a wasteful number, since it uses less digits than its factorization.

19434984437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21287043.

The product of its digits is 10450944, while the sum is 56.

The spelling of 19434984437 in words is "nineteen billion, four hundred thirty-four million, nine hundred eighty-four thousand, four hundred thirty-seven".