19994204160 has 384 divisors, whose sum is σ = 81234316800. Its totient is φ = 4569661440.

The previous prime is 19994204159. The next prime is 19994204173. The reversal of 19994204160 is 6140249991.

19994204160 is a `hidden beast` number, since 199 + 9 + 42 + 0 + 416 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×19994204160² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1930195 + ... + 1940525.

It is an arithmetic number, because the mean of its divisors is an integer number (211547700).

Almost surely, 2^19994204160 is an apocalyptic number.

19994204160 is a gapful number since it is divisible by the number (10) 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 19994204160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40617158400).

19994204160 is an abundant number, since it is smaller than the sum of its proper divisors (61240112640).

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

19994204160 is a wasteful number, since it uses less digits than its factorization.

19994204160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374 (or 10348 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 19994204160 in words is "nineteen billion, nine hundred ninety-four million, two hundred four thousand, one hundred sixty".