20112871668 has 12 divisors (see below), whose sum is σ = 46930033920. Its totient is φ = 6704290552.

The previous prime is 20112871661. The next prime is 20112871711. The reversal of 20112871668 is 86617821102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112871661) 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, 838036308 + ... + 838036331.

It is an arithmetic number, because the mean of its divisors is an integer number (3910836160).

Almost surely, 2^20112871668 is an apocalyptic number.

It is an amenable number.

20112871668 is an abundant number, since it is smaller than the sum of its proper divisors (26817162252).

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

20112871668 is a wasteful number, since it uses less digits than its factorization.

20112871668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676072646 (or 1676072644 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

It can be divided in two parts, 20112 and 871668, that added together give a triangular number (891780 = T₁₃₃₅).

The spelling of 20112871668 in words is "twenty billion, one hundred twelve million, eight hundred seventy-one thousand, six hundred sixty-eight".