20246642125051 has 16 divisors (see below), whose sum is σ = 20911819152096. Its totient is φ = 19591967805696.

The previous prime is 20246642125043. The next prime is 20246642125063. The reversal of 20246642125051 is 15052124664202.

It is a cyclic number.

It is not a de Polignac number, because 20246642125051 - 2³ = 20246642125043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20246642124995 and 20246642125013.

It is not an unprimeable number, because it can be changed into a prime (20246642128051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255171181 + ... + 255250513.

It is an arithmetic number, because the mean of its divisors is an integer number (1306988697006).

Almost surely, 2^{20246642125051} is an apocalyptic number.

20246642125051 is a deficient number, since it is larger than the sum of its proper divisors (665177027045).

20246642125051 is an equidigital number, since it uses as much as digits as its factorization.

20246642125051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145422.

The product of its (nonzero) digits is 230400, while the sum is 40.

Adding to 20246642125051 its reverse (15052124664202), we get a palindrome (35298766789253).

The spelling of 20246642125051 in words is "twenty trillion, two hundred forty-six billion, six hundred forty-two million, one hundred twenty-five thousand, fifty-one".