20195001 has 24 divisors (see below), whose sum is σ = 31004064. Its totient is φ = 13128480.

The previous prime is 20194973. The next prime is 20195009. The reversal of 20195001 is 10059102.

It is not a de Polignac number, because 20195001 - 2⁵ = 20194969 is a prime.

It is a Curzon number.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8950 + ... + 10976.

It is an arithmetic number, because the mean of its divisors is an integer number (1291836).

Almost surely, 2^20195001 is an apocalyptic number.

It is an amenable number.

20195001 is a deficient number, since it is larger than the sum of its proper divisors (10809063).

20195001 is an equidigital number, since it uses as much as digits as its factorization.

20195001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083 (or 2071 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 20195001 is about 4493.8848449866. The cubic root of 20195001 is about 272.3211002061.

The spelling of 20195001 in words is "twenty million, one hundred ninety-five thousand, one".