20711100111228 has 36 divisors (see below), whose sum is σ = 54041866959808. Its totient is φ = 6681000035520.

The previous prime is 20711100111217. The next prime is 20711100111257. The reversal of 20711100111228 is 82211100111702.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9279165601 + ... + 9279167832.

Almost surely, 2^{20711100111228} is an apocalyptic number.

It is an amenable number.

20711100111228 is an abundant number, since it is smaller than the sum of its proper divisors (33330766848580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20711100111228 is a wasteful number, since it uses less digits than its factorization.

20711100111228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18558333474 (or 18558333469 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 27.

The spelling of 20711100111228 in words is "twenty trillion, seven hundred eleven billion, one hundred million, one hundred eleven thousand, two hundred twenty-eight".