20102111188 has 24 divisors (see below), whose sum is σ = 37040662400. Its totient is φ = 9519363648.

The previous prime is 20102111129. The next prime is 20102111189. The reversal of 20102111188 is 88111120102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102111189) 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, 247768 + ... + 318736.

Almost surely, 2^20102111188 is an apocalyptic number.

It is an amenable number.

20102111188 is a deficient number, since it is larger than the sum of its proper divisors (16938551212).

20102111188 is a wasteful number, since it uses less digits than its factorization.

20102111188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74719 (or 74717 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 25.

The spelling of 20102111188 in words is "twenty billion, one hundred two million, one hundred eleven thousand, one hundred eighty-eight".