20551145042111 has 8 divisors (see below), whose sum is σ = 20553799982640. Its totient is φ = 20548490288832.

The previous prime is 20551145042081. The next prime is 20551145042171. The reversal of 20551145042111 is 11124054115502.

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 20551145042111 - 2¹⁸ = 20551144779967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551145042171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478034405 + ... + 478077393.

It is an arithmetic number, because the mean of its divisors is an integer number (2569224997830).

Almost surely, 2^{20551145042111} is an apocalyptic number.

20551145042111 is a deficient number, since it is larger than the sum of its proper divisors (2654940529).

20551145042111 is a wasteful number, since it uses less digits than its factorization.

20551145042111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93625.

The product of its (nonzero) digits is 8000, while the sum is 32.

Adding to 20551145042111 its reverse (11124054115502), we get a palindrome (31675199157613).

The spelling of 20551145042111 in words is "twenty trillion, five hundred fifty-one billion, one hundred forty-five million, forty-two thousand, one hundred eleven".