19408402128 has 120 divisors (see below), whose sum is σ = 52231609344. Its totient is φ = 6209602560.

The previous prime is 19408402103. The next prime is 19408402177. The reversal of 19408402128 is 82120480491.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 5856600 + ... + 5859912.

Almost surely, 2^19408402128 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 19408402128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26115804672).

19408402128 is an abundant number, since it is smaller than the sum of its proper divisors (32823207216).

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

19408402128 is a wasteful number, since it uses less digits than its factorization.

19408402128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513 (or 3476 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 19408402128 in words is "nineteen billion, four hundred eight million, four hundred two thousand, one hundred twenty-eight".