20105555311 has 8 divisors (see below), whose sum is σ = 20184524864. Its totient is φ = 20026621440.

The previous prime is 20105555273. The next prime is 20105555341. The reversal of 20105555311 is 11355550102.

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 20105555311 - 2²³ = 20097166703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20105555311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105555341) 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, 1907191 + ... + 1917703.

It is an arithmetic number, because the mean of its divisors is an integer number (2523065608).

Almost surely, 2^20105555311 is an apocalyptic number.

20105555311 is a deficient number, since it is larger than the sum of its proper divisors (78969553).

20105555311 is a wasteful number, since it uses less digits than its factorization.

20105555311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17841.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 20105555311 in words is "twenty billion, one hundred five million, five hundred fifty-five thousand, three hundred eleven".