20670613856256 has 224 divisors, whose sum is σ = 67837881299328. Its totient is φ = 5451589877760.

The previous prime is 20670613856203. The next prime is 20670613856279. The reversal of 20670613856256 is 65265831607602.

It is a tau number, because it is divible by the number of its divisors (224).

It is a junction number, because it is equal to n+sod(n) for n = 20670613856196 and 20670613856205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2384955 + ... + 6857786.

It is an arithmetic number, because the mean of its divisors is an integer number (302847684372).

Almost surely, 2^{20670613856256} is an apocalyptic number.

20670613856256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20670613856256 is an abundant number, since it is smaller than the sum of its proper divisors (47167267443072).

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

20670613856256 is an equidigital number, since it uses as much as digits as its factorization.

20670613856256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9242790 (or 9242766 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 57.

The spelling of 20670613856256 in words is "twenty trillion, six hundred seventy billion, six hundred thirteen million, eight hundred fifty-six thousand, two hundred fifty-six".