20423242 has 16 divisors (see below), whose sum is σ = 35114112. Its totient is φ = 8727120.

The previous prime is 20423231. The next prime is 20423257. The reversal of 20423242 is 24232402.

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, 3267 + ... + 7177.

It is an arithmetic number, because the mean of its divisors is an integer number (2194632).

Almost surely, 2^20423242 is an apocalyptic number.

20423242 is a deficient number, since it is larger than the sum of its proper divisors (14690870).

20423242 is a wasteful number, since it uses less digits than its factorization.

20423242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 20423242 is about 4519.2081164735. The cubic root of 20423242 is about 273.3431707081.

Adding to 20423242 its reverse (24232402), we get a palindrome (44655644).

The spelling of 20423242 in words is "twenty million, four hundred twenty-three thousand, two hundred forty-two".