19798893504 has 462 divisors, whose sum is σ = 65872802976. Its totient is φ = 5895452160.

The previous prime is 19798893497. The next prime is 19798893523. The reversal of 19798893504 is 40539889791.

19798893504 is a `hidden beast` number, since 197 + 98 + 8 + 9 + 350 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 65 ways as a sum of consecutive naturals, for example, 638673969 + ... + 638673999.

Almost surely, 2^19798893504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19798893504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32936401488).

19798893504 is an abundant number, since it is smaller than the sum of its proper divisors (46073909472).

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

19798893504 is an frugal number, since it uses more digits than its factorization.

19798893504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 19798893504 in words is "nineteen billion, seven hundred ninety-eight million, eight hundred ninety-three thousand, five hundred four".