20130442 has 16 divisors (see below), whose sum is σ = 31190400. Its totient is φ = 9736848.

The previous prime is 20130413. The next prime is 20130449. The reversal of 20130442 is 24403102.

It is not an unprimeable number, because it can be changed into a prime (20130449) 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, 14043 + ... + 15409.

It is an arithmetic number, because the mean of its divisors is an integer number (1949400).

Almost surely, 2^20130442 is an apocalyptic number.

20130442 is a deficient number, since it is larger than the sum of its proper divisors (11059958).

20130442 is a wasteful number, since it uses less digits than its factorization.

20130442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605.

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

The square root of 20130442 is about 4486.6961118400. The cubic root of 20130442 is about 272.0306067779.

Adding to 20130442 its reverse (24403102), we get a palindrome (44533544).

The spelling of 20130442 in words is "twenty million, one hundred thirty thousand, four hundred forty-two".