20024402042 has 4 divisors (see below), whose sum is σ = 30036603066. Its totient is φ = 10012201020.

The previous prime is 20024401987. The next prime is 20024402077. The reversal of 20024402042 is 24020442002.

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., 12345209881 + 7679192161 = 111109^2 + 87631^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5006100509 + ... + 5006100512.

Almost surely, 2^20024402042 is an apocalyptic number.

20024402042 is a deficient number, since it is larger than the sum of its proper divisors (10012201024).

20024402042 is a wasteful number, since it uses less digits than its factorization.

20024402042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10012201023.

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20024402042 its reverse (24020442002), we get a palindrome (44044844044).

It can be divided in two parts, 2002 and 4402042, that added together give a palindrome (4404044).

The spelling of 20024402042 in words is "twenty billion, twenty-four million, four hundred two thousand, forty-two".