10020440042 has 4 divisors (see below), whose sum is σ = 15030660066. Its totient is φ = 5010220020.

The previous prime is 10020440009. The next prime is 10020440047. The reversal of 10020440042 is 24004402001.

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., 7064234401 + 2956205641 = 84049^2 + 54371^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 10020440042.

It is not an unprimeable number, because it can be changed into a prime (10020440047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2505110009 + ... + 2505110012.

Almost surely, 2^10020440042 is an apocalyptic number.

10020440042 is a deficient number, since it is larger than the sum of its proper divisors (5010220024).

10020440042 is an equidigital number, since it uses as much as digits as its factorization.

10020440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010220023.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 10020440042 its reverse (24004402001), we get a palindrome (34024842043).

The spelling of 10020440042 in words is "ten billion, twenty million, four hundred forty thousand, forty-two".