20801685046 has 16 divisors (see below), whose sum is σ = 31292632800. Its totient is φ = 10370850880.

The previous prime is 20801685043. The next prime is 20801685053. The reversal of 20801685046 is 64058610802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20801685041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016556 + ... + 1036816.

It is an arithmetic number, because the mean of its divisors is an integer number (1955789550).

Almost surely, 2^20801685046 is an apocalyptic number.

20801685046 is a deficient number, since it is larger than the sum of its proper divisors (10490947754).

20801685046 is a wasteful number, since it uses less digits than its factorization.

20801685046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21719.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 20801685046 in words is "twenty billion, eight hundred one million, six hundred eighty-five thousand, forty-six".