20200191000 has 256 divisors, whose sum is σ = 69006712320. Its totient is φ = 4879040000.

The previous prime is 20200190981. The next prime is 20200191001. The reversal of 20200191000 is 19100202.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200191001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10460035 + ... + 10461965.

It is an arithmetic number, because the mean of its divisors is an integer number (269557470).

Almost surely, 2^20200191000 is an apocalyptic number.

20200191000 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 20200191000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34503356160).

20200191000 is an abundant number, since it is smaller than the sum of its proper divisors (48806521320).

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

20200191000 is a wasteful number, since it uses less digits than its factorization.

20200191000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283 (or 2269 counting only the distinct ones).

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

Adding to 20200191000 its reverse (19100202), we get a palindrome (20219291202).

The spelling of 20200191000 in words is "twenty billion, two hundred million, one hundred ninety-one thousand".