19384634881 has 8 divisors (see below), whose sum is σ = 19442052864. Its totient is φ = 19327275360.

The previous prime is 19384634873. The next prime is 19384634891. The reversal of 19384634881 is 18843648391.

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 19384634881 - 2³ = 19384634873 is a prime.

It is a super-2 number, since 2×19384634881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19384634891) 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, 700596 + ... + 727738.

It is an arithmetic number, because the mean of its divisors is an integer number (2430256608).

Almost surely, 2^19384634881 is an apocalyptic number.

It is an amenable number.

19384634881 is a deficient number, since it is larger than the sum of its proper divisors (57417983).

19384634881 is a wasteful number, since it uses less digits than its factorization.

19384634881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29231.

The product of its digits is 3981312, while the sum is 55.

The spelling of 19384634881 in words is "nineteen billion, three hundred eighty-four million, six hundred thirty-four thousand, eight hundred eighty-one".