19408408712 has 96 divisors (see below), whose sum is σ = 46229097600. Its totient is φ = 7476522240.

The previous prime is 19408408693. The next prime is 19408408727. The reversal of 19408408712 is 21780480491.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 586973 + ... + 619155.

It is an arithmetic number, because the mean of its divisors is an integer number (481553100).

Almost surely, 2^19408408712 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 19408408712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23114548800).

19408408712 is an abundant number, since it is smaller than the sum of its proper divisors (26820688888).

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

19408408712 is a wasteful number, since it uses less digits than its factorization.

19408408712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32307 (or 32292 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The spelling of 19408408712 in words is "nineteen billion, four hundred eight million, four hundred eight thousand, seven hundred twelve".