20656823446 has 32 divisors (see below), whose sum is σ = 37299778560. Its totient is φ = 8381511936.

The previous prime is 20656823393. The next prime is 20656823479. The reversal of 20656823446 is 64432865602.

It is a junction number, because it is equal to n+sod(n) for n = 20656823396 and 20656823405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396550 + ... + 445606.

It is an arithmetic number, because the mean of its divisors is an integer number (1165618080).

Almost surely, 2^20656823446 is an apocalyptic number.

20656823446 is a deficient number, since it is larger than the sum of its proper divisors (16642955114).

20656823446 is a wasteful number, since it uses less digits than its factorization.

20656823446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50668.

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 20656823446 in words is "twenty billion, six hundred fifty-six million, eight hundred twenty-three thousand, four hundred forty-six".