20804640006860 has 48 divisors (see below), whose sum is σ = 43725456373536. Its totient is φ = 8315055316992.

The previous prime is 20804640006841. The next prime is 20804640006893. The reversal of 20804640006860 is 6860004640802.

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, 217840679 + ... + 217936161.

It is an arithmetic number, because the mean of its divisors is an integer number (910947007782).

Almost surely, 2^{20804640006860} is an apocalyptic number.

20804640006860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20804640006860 is an abundant number, since it is smaller than the sum of its proper divisors (22920816366676).

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

20804640006860 is a wasteful number, since it uses less digits than its factorization.

20804640006860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104282 (or 104280 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 20804640006860 in words is "twenty trillion, eight hundred four billion, six hundred forty million, six thousand, eight hundred sixty".