20388385371720 has 64 divisors (see below), whose sum is σ = 61726304376000. Its totient is φ = 5387022920448.

The previous prime is 20388385371709. The next prime is 20388385371721. The reversal of 20388385371720 is 2717358388302.

It is not an unprimeable number, because it can be changed into a prime (20388385371721) 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, 779359450 + ... + 779385609.

It is an arithmetic number, because the mean of its divisors is an integer number (964473505875).

Almost surely, 2^{20388385371720} is an apocalyptic number.

20388385371720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20388385371720 is an abundant number, since it is smaller than the sum of its proper divisors (41337919004280).

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

20388385371720 is a wasteful number, since it uses less digits than its factorization.

20388385371720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558745182 (or 1558745178 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 20388385371720 in words is "twenty trillion, three hundred eighty-eight billion, three hundred eighty-five million, three hundred seventy-one thousand, seven hundred twenty".