20199697709520 has 160 divisors (see below), whose sum is σ = 73873180385280. Its totient is φ = 4468135887360.

The previous prime is 20199697709413. The next prime is 20199697709533. The reversal of 20199697709520 is 2590779699102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193877430 + ... + 193981589.

It is an arithmetic number, because the mean of its divisors is an integer number (461707377408).

Almost surely, 2^{20199697709520} is an apocalyptic number.

20199697709520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20199697709520 is an abundant number, since it is smaller than the sum of its proper divisors (53673482675760).

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

20199697709520 is a wasteful number, since it uses less digits than its factorization.

20199697709520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387859073 (or 387859067 counting only the distinct ones).

The product of its (nonzero) digits is 38578680, while the sum is 66.

The spelling of 20199697709520 in words is "twenty trillion, one hundred ninety-nine billion, six hundred ninety-seven million, seven hundred nine thousand, five hundred twenty".