20604250042 has 4 divisors (see below), whose sum is σ = 30906375066. Its totient is φ = 10302125020.

The previous prime is 20604250027. The next prime is 20604250067. The reversal of 20604250042 is 24005240602.

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., 20604018681 + 231361 = 143541^2 + 481^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20604249989 and 20604250016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5151062509 + ... + 5151062512.

Almost surely, 2^20604250042 is an apocalyptic number.

20604250042 is a deficient number, since it is larger than the sum of its proper divisors (10302125024).

20604250042 is a wasteful number, since it uses less digits than its factorization.

20604250042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10302125023.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20604250042 its reverse (24005240602), we get a palindrome (44609490644).

The spelling of 20604250042 in words is "twenty billion, six hundred four million, two hundred fifty thousand, forty-two".