20431042 has 16 divisors (see below), whose sum is σ = 34158240. Its totient is φ = 9108288.

The previous prime is 20431039. The next prime is 20431043. The reversal of 20431042 is 24013402.

It is not an unprimeable number, because it can be changed into a prime (20431043) by changing a digit.

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, 15168 + ... + 16459.

It is an arithmetic number, because the mean of its divisors is an integer number (2134890).

Almost surely, 2^20431042 is an apocalyptic number.

20431042 is a deficient number, since it is larger than the sum of its proper divisors (13727198).

20431042 is a wasteful number, since it uses less digits than its factorization.

20431042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31665.

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

The square root of 20431042 is about 4520.0710171412. The cubic root of 20431042 is about 273.3779644881.

Adding to 20431042 its reverse (24013402), we get a palindrome (44444444).

The spelling of 20431042 in words is "twenty million, four hundred thirty-one thousand, forty-two".