20646602406446 has 16 divisors (see below), whose sum is σ = 31971381301248. Its totient is φ = 9989526317400.

The previous prime is 20646602406439. The next prime is 20646602406457. The reversal of 20646602406446 is 64460420664602.

It is a junction number, because it is equal to n+sod(n) for n = 20646602406394 and 20646602406403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11936390 + ... + 13556201.

It is an arithmetic number, because the mean of its divisors is an integer number (1998211331328).

Almost surely, 2^{20646602406446} is an apocalyptic number.

20646602406446 is a deficient number, since it is larger than the sum of its proper divisors (11324778894802).

20646602406446 is a wasteful number, since it uses less digits than its factorization.

20646602406446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25505687.

The product of its (nonzero) digits is 7962624, while the sum is 50.

The spelling of 20646602406446 in words is "twenty trillion, six hundred forty-six billion, six hundred two million, four hundred six thousand, four hundred forty-six".