20919560799198 has 16 divisors (see below), whose sum is σ = 41840670888576. Its totient is φ = 6972928718040.

The previous prime is 20919560799197. The next prime is 20919560799251. The reversal of 20919560799198 is 89199706591902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20919560799191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64378186 + ... + 64702317.

It is an arithmetic number, because the mean of its divisors is an integer number (2615041930536).

Almost surely, 2^{20919560799198} is an apocalyptic number.

20919560799198 is an abundant number, since it is smaller than the sum of its proper divisors (20921110089378).

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

20919560799198 is a wasteful number, since it uses less digits than its factorization.

20919560799198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129107519.

The product of its (nonzero) digits is 198404640, while the sum is 75.

The spelling of 20919560799198 in words is "twenty trillion, nine hundred nineteen billion, five hundred sixty million, seven hundred ninety-nine thousand, one hundred ninety-eight".