19009109736 has 96 divisors (see below), whose sum is σ = 53947296000. Its totient is φ = 6035390592.

The previous prime is 19009109729. The next prime is 19009109741. The reversal of 19009109736 is 63790190091.

It is a super-2 number, since 2×19009109736² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19009109691 and 19009109700.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371770 + ... + 419798.

It is an arithmetic number, because the mean of its divisors is an integer number (561951000).

Almost surely, 2^19009109736 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 19009109736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26973648000).

19009109736 is an abundant number, since it is smaller than the sum of its proper divisors (34938186264).

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

19009109736 is a wasteful number, since it uses less digits than its factorization.

19009109736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48303 (or 48296 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The spelling of 19009109736 in words is "nineteen billion, nine million, one hundred nine thousand, seven hundred thirty-six".