19799155220 has 48 divisors (see below), whose sum is σ = 45129197568. Its totient is φ = 7252882560.

The previous prime is 19799155177. The next prime is 19799155241. The reversal of 19799155220 is 2255199791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266786 + ... + 332825.

It is an arithmetic number, because the mean of its divisors is an integer number (940191616).

Almost surely, 2^19799155220 is an apocalyptic number.

19799155220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19799155220 is an abundant number, since it is smaller than the sum of its proper divisors (25330042348).

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

19799155220 is a wasteful number, since it uses less digits than its factorization.

19799155220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599760 (or 599758 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 50.

The spelling of 19799155220 in words is "nineteen billion, seven hundred ninety-nine million, one hundred fifty-five thousand, two hundred twenty".