20995203 has 4 divisors (see below), whose sum is σ = 27993608. Its totient is φ = 13996800.

The previous prime is 20995201. The next prime is 20995207. The reversal of 20995203 is 30259902.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20995203 - 2¹ = 20995201 is a prime.

It is a super-2 number, since 2×20995203² = 881597098022418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20995201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3499198 + ... + 3499203.

It is an arithmetic number, because the mean of its divisors is an integer number (6998402).

Almost surely, 2^20995203 is an apocalyptic number.

20995203 is a deficient number, since it is larger than the sum of its proper divisors (6998405).

20995203 is an equidigital number, since it uses as much as digits as its factorization.

20995203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6998404.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 20995203 is about 4582.0522694531. The cubic root of 20995203 is about 275.8714088014.

The spelling of 20995203 in words is "twenty million, nine hundred ninety-five thousand, two hundred three".