191020220160 has 864 divisors, whose sum is σ = 793425072384. Its totient is φ = 38707200000.

The previous prime is 191020220117. The next prime is 191020220173. The reversal of 191020220160 is 61022020191.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 191020220160.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 84859035 + ... + 84861285.

It is an arithmetic number, because the mean of its divisors is an integer number (918316056).

Almost surely, 2^191020220160 is an apocalyptic number.

191020220160 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 191020220160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396712536192).

191020220160 is an abundant number, since it is smaller than the sum of its proper divisors (602404852224).

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

191020220160 is a wasteful number, since it uses less digits than its factorization.

191020220160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 191020220160 in words is "one hundred ninety-one billion, twenty million, two hundred twenty thousand, one hundred sixty".