20201995 has 8 divisors (see below), whose sum is σ = 26446320. Its totient is φ = 14692320.

The previous prime is 20201983. The next prime is 20202011. The reversal of 20201995 is 59910202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20201995 - 2⁹ = 20201483 is a prime.

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, 183600 + ... + 183709.

It is an arithmetic number, because the mean of its divisors is an integer number (3305790).

Almost surely, 2^20201995 is an apocalyptic number.

20201995 is a deficient number, since it is larger than the sum of its proper divisors (6244325).

20201995 is a wasteful number, since it uses less digits than its factorization.

20201995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367325.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20201995 is about 4494.6629462063. The cubic root of 20201995 is about 272.3525336277.

The spelling of 20201995 in words is "twenty million, two hundred one thousand, nine hundred ninety-five".