19009799064 has 32 divisors (see below), whose sum is σ = 52804998000. Its totient is φ = 6336599616.

The previous prime is 19009799021. The next prime is 19009799113. The reversal of 19009799064 is 46099790091.

It is a super-2 number, since 2×19009799064² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 19009799064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44003949 + ... + 44004380.

Almost surely, 2^19009799064 is an apocalyptic number.

It is an amenable number.

19009799064 is an abundant number, since it is smaller than the sum of its proper divisors (33795198936).

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

19009799064 is a wasteful number, since it uses less digits than its factorization.

19009799064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88008344 (or 88008334 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 19009799064 in words is "nineteen billion, nine million, seven hundred ninety-nine thousand, sixty-four".