19495938000 has 640 divisors, whose sum is σ = 82526146560. Its totient is φ = 3836160000.

The previous prime is 19495937963. The next prime is 19495938043. The reversal of 19495938000 is 83959491.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 8776890 + ... + 8779110.

It is an arithmetic number, because the mean of its divisors is an integer number (128947104).

Almost surely, 2^19495938000 is an apocalyptic number.

19495938000 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 19495938000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41263073280).

19495938000 is an abundant number, since it is smaller than the sum of its proper divisors (63030208560).

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

19495938000 is a wasteful number, since it uses less digits than its factorization.

19495938000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284 (or 2268 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 19495938000 in words is "nineteen billion, four hundred ninety-five million, nine hundred thirty-eight thousand".