19378660500 has 432 divisors, whose sum is σ = 65769500160. Its totient is φ = 4801680000.

The previous prime is 19378660493. The next prime is 19378660501. The reversal of 19378660500 is 506687391.

It is a happy number.

19378660500 is a `hidden beast` number, since 1 + 9 + 3 + 7 + 86 + 60 + 500 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19378660501) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 128335425 + ... + 128335575.

Almost surely, 2^19378660500 is an apocalyptic number.

19378660500 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 19378660500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32884750080).

19378660500 is an abundant number, since it is smaller than the sum of its proper divisors (46390839660).

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

19378660500 is a wasteful number, since it uses less digits than its factorization.

19378660500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 19378660500 in words is "nineteen billion, three hundred seventy-eight million, six hundred sixty thousand, five hundred".