20550107911 has 4 divisors (see below), whose sum is σ = 20609330472. Its totient is φ = 20490885352.

The previous prime is 20550107887. The next prime is 20550107939. The reversal of 20550107911 is 11970105502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20550107911 - 2⁷ = 20550107783 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 (20550108911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29610760 + ... + 29611453.

It is an arithmetic number, because the mean of its divisors is an integer number (5152332618).

Almost surely, 2^20550107911 is an apocalyptic number.

20550107911 is a deficient number, since it is larger than the sum of its proper divisors (59222561).

20550107911 is an equidigital number, since it uses as much as digits as its factorization.

20550107911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59222560.

The product of its (nonzero) digits is 3150, while the sum is 31.

The spelling of 20550107911 in words is "twenty billion, five hundred fifty million, one hundred seven thousand, nine hundred eleven".