20582423842 has 4 divisors (see below), whose sum is σ = 30873635766. Its totient is φ = 10291211920.

The previous prime is 20582423801. The next prime is 20582423861. The reversal of 20582423842 is 24832428502.

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., 11251057041 + 9331366801 = 106071^2 + 96599^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20582423795 and 20582423804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5145605959 + ... + 5145605962.

Almost surely, 2^20582423842 is an apocalyptic number.

20582423842 is a deficient number, since it is larger than the sum of its proper divisors (10291211924).

20582423842 is a wasteful number, since it uses less digits than its factorization.

20582423842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10291211923.

The product of its (nonzero) digits is 245760, while the sum is 40.

The spelling of 20582423842 in words is "twenty billion, five hundred eighty-two million, four hundred twenty-three thousand, eight hundred forty-two".