19394424000 has 896 divisors, whose sum is σ = 82772951040. Its totient is φ = 4354560000.

The previous prime is 19394423987. The next prime is 19394424079. The reversal of 19394424000 is 42449391.

It is a super-2 number, since 2×19394424000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 152711937 + ... + 152712063.

Almost surely, 2^19394424000 is an apocalyptic number.

19394424000 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 19394424000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41386475520).

19394424000 is an abundant number, since it is smaller than the sum of its proper divisors (63378527040).

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

19394424000 is a wasteful number, since it uses less digits than its factorization.

19394424000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 19394424000 in words is "nineteen billion, three hundred ninety-four million, four hundred twenty-four thousand".