20200999 has 8 divisors (see below), whose sum is σ = 24862880. Its totient is φ = 15983136.

The previous prime is 20200993. The next prime is 20201021. The reversal of 20200999 is 99900202.

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

It is not a de Polignac number, because 20200999 - 2⁵ = 20200967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20200999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200993) 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 7 ways as a sum of consecutive naturals, for example, 110904 + ... + 111085.

It is an arithmetic number, because the mean of its divisors is an integer number (3107860).

Almost surely, 2^20200999 is an apocalyptic number.

20200999 is a deficient number, since it is larger than the sum of its proper divisors (4661881).

20200999 is a wasteful number, since it uses less digits than its factorization.

20200999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222009.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 20200999 is about 4494.5521467661. The cubic root of 20200999 is about 272.3480577070.

The spelling of 20200999 in words is "twenty million, two hundred thousand, nine hundred ninety-nine".