2191746020 has 48 divisors (see below), whose sum is σ = 4728423168. Its totient is φ = 852867840.

The previous prime is 2191745993. The next prime is 2191746031. The reversal of 2191746020 is 206471912.

It is a happy 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, 297299 + ... + 304581.

It is an arithmetic number, because the mean of its divisors is an integer number (98508816).

Almost surely, 2^2191746020 is an apocalyptic number.

2191746020 is a gapful number since it is divisible by the number (20) 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 2191746020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2364211584).

2191746020 is an abundant number, since it is smaller than the sum of its proper divisors (2536677148).

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

2191746020 is a wasteful number, since it uses less digits than its factorization.

2191746020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7700 (or 7698 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 2191746020 is about 46816.0871923317. The cubic root of 2191746020 is about 1298.9628848610.

The spelling of 2191746020 in words is "two billion, one hundred ninety-one million, seven hundred forty-six thousand, twenty".