20204258 has 16 divisors (see below), whose sum is σ = 33289920. Its totient is φ = 9153936.

The previous prime is 20204243. The next prime is 20204269. The reversal of 20204258 is 85240202.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10685 + ... + 12432.

It is an arithmetic number, because the mean of its divisors is an integer number (2080620).

Almost surely, 2^20204258 is an apocalyptic number.

20204258 is a deficient number, since it is larger than the sum of its proper divisors (13085662).

20204258 is a wasteful number, since it uses less digits than its factorization.

20204258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23161.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 20204258 is about 4494.9146821714. The cubic root of 20204258 is about 272.3627027681.

The spelling of 20204258 in words is "twenty million, two hundred four thousand, two hundred fifty-eight".