20239258 has 16 divisors (see below), whose sum is σ = 32812416. Its totient is φ = 9307440.

The previous prime is 20239253. The next prime is 20239267. The reversal of 20239258 is 85293202.

It is not an unprimeable number, because it can be changed into a prime (20239253) 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 7 ways as a sum of consecutive naturals, for example, 6835 + ... + 9337.

It is an arithmetic number, because the mean of its divisors is an integer number (2050776).

Almost surely, 2^20239258 is an apocalyptic number.

20239258 is a deficient number, since it is larger than the sum of its proper divisors (12573158).

20239258 is a wasteful number, since it uses less digits than its factorization.

20239258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20239258 is about 4498.8062861164. The cubic root of 20239258 is about 272.5198840806.

The spelling of 20239258 in words is "twenty million, two hundred thirty-nine thousand, two hundred fifty-eight".