20020099 has 4 divisors (see below), whose sum is σ = 21840120. Its totient is φ = 18200080.

The previous prime is 20020093. The next prime is 20020103. The reversal of 20020099 is 99002002.

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

It is a cyclic number.

It is not a de Polignac number, because 20020099 - 2⁷ = 20019971 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020093) 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 3 ways as a sum of consecutive naturals, for example, 909994 + ... + 910015.

It is an arithmetic number, because the mean of its divisors is an integer number (5460030).

Almost surely, 2^20020099 is an apocalyptic number.

20020099 is a deficient number, since it is larger than the sum of its proper divisors (1820021).

20020099 is a wasteful number, since it uses less digits than its factorization.

20020099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820020.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20020099 is about 4474.3825272321. The cubic root of 20020099 is about 271.5326596831.

The spelling of 20020099 in words is "twenty million, twenty thousand, ninety-nine".