20579324111840 has 96 divisors (see below), whose sum is σ = 52369049880000. Its totient is φ = 7596995825664.

The previous prime is 20579324111837. The next prime is 20579324111849. The reversal of 20579324111840 is 4811142397502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20579324111849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9408332 + ... + 11387508.

It is an arithmetic number, because the mean of its divisors is an integer number (545510936250).

Almost surely, 2^{20579324111840} is an apocalyptic number.

20579324111840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20579324111840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26184524940000).

20579324111840 is an abundant number, since it is smaller than the sum of its proper divisors (31789725768160).

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

20579324111840 is a wasteful number, since it uses less digits than its factorization.

20579324111840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984204 (or 1984196 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 20579324111840 in words is "twenty trillion, five hundred seventy-nine billion, three hundred twenty-four million, one hundred eleven thousand, eight hundred forty".