20195000 has 80 divisors (see below), whose sum is σ = 54170160. Its totient is φ = 6912000.

The previous prime is 20194973. The next prime is 20195009. The reversal of 20195000 is 59102.

It is a self number, because there is not a number n which added to its sum of digits gives 20195000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20195009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34712 + ... + 35288.

It is an arithmetic number, because the mean of its divisors is an integer number (677127).

Almost surely, 2^20195000 is an apocalyptic number.

20195000 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 20195000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27085080).

20195000 is an abundant number, since it is smaller than the sum of its proper divisors (33975160).

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

20195000 is an equidigital number, since it uses as much as digits as its factorization.

20195000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 20195000 is about 4493.8847337243. The cubic root of 20195000 is about 272.3210957112.

The spelling of 20195000 in words is "twenty million, one hundred ninety-five thousand".