20644576452070 has 16 divisors (see below), whose sum is σ = 37160876814048. Its totient is φ = 8257688536320.

The previous prime is 20644576451971. The next prime is 20644576452113. The reversal of 20644576452070 is 7025467544602.

It is a junction number, because it is equal to n+sod(n) for n = 20644576451999 and 20644576452017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17144139 + ... + 18308758.

It is an arithmetic number, because the mean of its divisors is an integer number (2322554800878).

Almost surely, 2^{20644576452070} is an apocalyptic number.

20644576452070 is a deficient number, since it is larger than the sum of its proper divisors (16516300361978).

20644576452070 is a wasteful number, since it uses less digits than its factorization.

20644576452070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35511135.

The product of its (nonzero) digits is 11289600, while the sum is 52.

The spelling of 20644576452070 in words is "twenty trillion, six hundred forty-four billion, five hundred seventy-six million, four hundred fifty-two thousand, seventy".