19894685832 has 256 divisors, whose sum is σ = 66882816000. Its totient is φ = 5352562944.

The previous prime is 19894685827. The next prime is 19894685873. The reversal of 19894685832 is 23858649891.

19894685832 is a `hidden beast` number, since 1 + 9 + 8 + 9 + 46 + 8 + 583 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 19894685832.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4967943 + ... + 4971945.

It is an arithmetic number, because the mean of its divisors is an integer number (261261000).

Almost surely, 2^19894685832 is an apocalyptic number.

19894685832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19894685832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33441408000).

19894685832 is an abundant number, since it is smaller than the sum of its proper divisors (46988130168).

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

19894685832 is a wasteful number, since it uses less digits than its factorization.

19894685832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217 (or 4207 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 19894685832 in words is "nineteen billion, eight hundred ninety-four million, six hundred eighty-five thousand, eight hundred thirty-two".