2000191020 has 24 divisors (see below), whose sum is σ = 5600535024. Its totient is φ = 533384256.

The previous prime is 2000191003. The next prime is 2000191033. The reversal of 2000191020 is 201910002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16668199 + ... + 16668318.

It is an arithmetic number, because the mean of its divisors is an integer number (233355626).

Almost surely, 2^2000191020 is an apocalyptic number.

2000191020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2000191020 is an abundant number, since it is smaller than the sum of its proper divisors (3600344004).

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

2000191020 is a wasteful number, since it uses less digits than its factorization.

2000191020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33336529 (or 33336527 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2000191020 is about 44723.4951675291. The cubic root of 2000191020 is about 1259.9611603044.

The spelling of 2000191020 in words is "two billion, one hundred ninety-one thousand, twenty".