20342099 has 4 divisors (see below), whose sum is σ = 20351136. Its totient is φ = 20333064.

The previous prime is 20342093. The next prime is 20342123. The reversal of 20342099 is 99024302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20342099 - 2⁴ = 20342083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20342093) 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, 1862 + ... + 6644.

It is an arithmetic number, because the mean of its divisors is an integer number (5087784).

Almost surely, 2^20342099 is an apocalyptic number.

20342099 is a deficient number, since it is larger than the sum of its proper divisors (9037).

20342099 is an equidigital number, since it uses as much as digits as its factorization.

20342099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9036.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20342099 is about 4510.2216131804. The cubic root of 20342099 is about 272.9806862407.

The spelling of 20342099 in words is "twenty million, three hundred forty-two thousand, ninety-nine".