20013442 has 4 divisors (see below), whose sum is σ = 30020166. Its totient is φ = 10006720.

The previous prime is 20013439. The next prime is 20013443. The reversal of 20013442 is 24431002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12609601 + 7403841 = 3551^2 + 2721^2 .

It is not an unprimeable number, because it can be changed into a prime (20013443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003359 + ... + 5003362.

Almost surely, 2^20013442 is an apocalyptic number.

20013442 is a deficient number, since it is larger than the sum of its proper divisors (10006724).

20013442 is a wasteful number, since it uses less digits than its factorization.

20013442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006723.

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

The square root of 20013442 is about 4473.6385638538. The cubic root of 20013442 is about 271.5025600433.

Adding to 20013442 its reverse (24431002), we get a palindrome (44444444).

The spelling of 20013442 in words is "twenty million, thirteen thousand, four hundred forty-two".