20020668868668 has 48 divisors (see below), whose sum is σ = 50308653892896. Its totient is φ = 6160168277760.

The previous prime is 20020668868661. The next prime is 20020668868721. The reversal of 20020668868668 is 86686886602002.

It is a junction number, because it is equal to n+sod(n) for n = 20020668868599 and 20020668868608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020668868661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36302230 + ... + 36849602.

It is an arithmetic number, because the mean of its divisors is an integer number (1048096956102).

Almost surely, 2^{20020668868668} is an apocalyptic number.

It is an amenable number.

20020668868668 is an abundant number, since it is smaller than the sum of its proper divisors (30287985024228).

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

20020668868668 is a wasteful number, since it uses less digits than its factorization.

20020668868668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781854 (or 781852 counting only the distinct ones).

The product of its (nonzero) digits is 127401984, while the sum is 66.

The spelling of 20020668868668 in words is "twenty trillion, twenty billion, six hundred sixty-eight million, eight hundred sixty-eight thousand, six hundred sixty-eight".