20123242 has 16 divisors (see below), whose sum is σ = 31872960. Its totient is φ = 9502272.

The previous prime is 20123239. The next prime is 20123263. The reversal of 20123242 is 24232102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15843 + ... + 17065.

It is an arithmetic number, because the mean of its divisors is an integer number (1992060).

Almost surely, 2^20123242 is an apocalyptic number.

20123242 is a deficient number, since it is larger than the sum of its proper divisors (11749718).

20123242 is a wasteful number, since it uses less digits than its factorization.

20123242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20123242 is about 4485.8936679328. The cubic root of 20123242 is about 271.9981707634.

Adding to 20123242 its reverse (24232102), we get a palindrome (44355344).

The spelling of 20123242 in words is "twenty million, one hundred twenty-three thousand, two hundred forty-two".