20023099 has 4 divisors (see below), whose sum is σ = 20094136. Its totient is φ = 19952064.

The previous prime is 20023063. The next prime is 20023121. The reversal of 20023099 is 99032002.

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 20023099 - 2⁷ = 20022971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023009) 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, 35094 + ... + 35659.

It is an arithmetic number, because the mean of its divisors is an integer number (5023534).

Almost surely, 2^20023099 is an apocalyptic number.

20023099 is a deficient number, since it is larger than the sum of its proper divisors (71037).

20023099 is an equidigital number, since it uses as much as digits as its factorization.

20023099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71036.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 20023099 is about 4474.7177564624. The cubic root of 20023099 is about 271.5462220085.

The spelling of 20023099 in words is "twenty million, twenty-three thousand, ninety-nine".