20042254564 has 12 divisors (see below), whose sum is σ = 35421212988. Its totient is φ = 9921908000.

The previous prime is 20042254559. The next prime is 20042254597. The reversal of 20042254564 is 46545224002.

It can be written as a sum of positive squares in 2 ways, for example, as 16475776164 + 3566478400 = 128358^2 + 59720^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24804367 + ... + 24805174.

It is an arithmetic number, because the mean of its divisors is an integer number (2951767749).

Almost surely, 2^20042254564 is an apocalyptic number.

It is an amenable number.

20042254564 is a deficient number, since it is larger than the sum of its proper divisors (15378958424).

20042254564 is a wasteful number, since it uses less digits than its factorization.

20042254564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49609646 (or 49609644 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 20042254564 its reverse (46545224002), we get a palindrome (66587478566).

The spelling of 20042254564 in words is "twenty billion, forty-two million, two hundred fifty-four thousand, five hundred sixty-four".