20718315738846 has 24 divisors (see below), whose sum is σ = 48970564474104. Its totient is φ = 6278277496560.

The previous prime is 20718315738811. The next prime is 20718315738847. The reversal of 20718315738846 is 64883751381702.

It is a happy number.

20718315738846 is a `hidden beast` number, since 2 + 0 + 7 + 18 + 3 + 1 + 573 + 8 + 8 + 46 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20718315738847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52318978941 + ... + 52318979336.

It is an arithmetic number, because the mean of its divisors is an integer number (2040440186421).

Almost surely, 2^{20718315738846} is an apocalyptic number.

20718315738846 is an abundant number, since it is smaller than the sum of its proper divisors (28252248735258).

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

20718315738846 is a wasteful number, since it uses less digits than its factorization.

20718315738846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104637958296 (or 104637958293 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 20718315738846 in words is "twenty trillion, seven hundred eighteen billion, three hundred fifteen million, seven hundred thirty-eight thousand, eight hundred forty-six".