19836738220 has 192 divisors, whose sum is σ = 47778264576. Its totient is φ = 6867763200.

The previous prime is 19836738151. The next prime is 19836738227. The reversal of 19836738220 is 2283763891.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19836738227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33005920 + ... + 33006520.

It is an arithmetic number, because the mean of its divisors is an integer number (248845128).

Almost surely, 2^19836738220 is an apocalyptic number.

19836738220 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 19836738220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23889132288).

19836738220 is an abundant number, since it is smaller than the sum of its proper divisors (27941526356).

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

19836738220 is a wasteful number, since it uses less digits than its factorization.

19836738220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 19836738220 in words is "nineteen billion, eight hundred thirty-six million, seven hundred thirty-eight thousand, two hundred twenty".