20868668084420 has 48 divisors (see below), whose sum is σ = 47841806454960. Its totient is φ = 7599801563136.

The previous prime is 20868668084401. The next prime is 20868668084443. The reversal of 20868668084420 is 2448086686802.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4568376165376 + 16300291919044 = 2137376^2 + 4037362^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549735185 + ... + 549773144.

It is an arithmetic number, because the mean of its divisors is an integer number (996704301145).

Almost surely, 2^{20868668084420} is an apocalyptic number.

20868668084420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20868668084420 is an abundant number, since it is smaller than the sum of its proper divisors (26973138370540).

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

20868668084420 is a wasteful number, since it uses less digits than its factorization.

20868668084420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099508424 (or 1099508422 counting only the distinct ones).

The product of its (nonzero) digits is 56623104, while the sum is 62.

The spelling of 20868668084420 in words is "twenty trillion, eight hundred sixty-eight billion, six hundred sixty-eight million, eighty-four thousand, four hundred twenty".