20511612610243 has 8 divisors (see below), whose sum is σ = 20565286527600. Its totient is φ = 20457971902368.

The previous prime is 20511612610219. The next prime is 20511612610259. The reversal of 20511612610243 is 34201621611502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20511612610243 - 2¹³ = 20511612602051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20511612610199 and 20511612610208.

It is not an unprimeable number, because it can be changed into a prime (20511612610273) 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 7 ways as a sum of consecutive naturals, for example, 7065228 + ... + 9536281.

It is an arithmetic number, because the mean of its divisors is an integer number (2570660815950).

Almost surely, 2^{20511612610243} is an apocalyptic number.

20511612610243 is a deficient number, since it is larger than the sum of its proper divisors (53673917357).

20511612610243 is a wasteful number, since it uses less digits than its factorization.

20511612610243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16604741.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 20511612610243 in words is "twenty trillion, five hundred eleven billion, six hundred twelve million, six hundred ten thousand, two hundred forty-three".