19408402832 has 80 divisors (see below), whose sum is σ = 46324868352. Its totient is φ = 7670868480.

The previous prime is 19408402831. The next prime is 19408402837. The reversal of 19408402832 is 23820480491.

It is a super-2 number, since 2×19408402832² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19408402832.

It is not an unprimeable number, because it can be changed into a prime (19408402831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1713893 + ... + 1725179.

Almost surely, 2^19408402832 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 19408402832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23162434176).

19408402832 is an abundant number, since it is smaller than the sum of its proper divisors (26916465520).

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

19408402832 is a wasteful number, since it uses less digits than its factorization.

19408402832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12496 (or 12490 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 19408402832 in words is "nineteen billion, four hundred eight million, four hundred two thousand, eight hundred thirty-two".