20598745789440 has 1408 divisors, whose sum is σ = 90639980928000. Its totient is φ = 4345660440576.

The previous prime is 20598745789439. The next prime is 20598745789441. The reversal of 20598745789440 is 4498754789502.

It is a happy number.

20598745789440 is a `hidden beast` number, since 2 + 0 + 5 + 9 + 8 + 7 + 4 + 578 + 9 + 4 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (20598745789439) and next prime (20598745789441).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20598745789441) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2125988116 + ... + 2125997804.

Almost surely, 2^{20598745789440} is an apocalyptic number.

20598745789440 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 20598745789440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45319990464000).

20598745789440 is an abundant number, since it is smaller than the sum of its proper divisors (70041235138560).

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

20598745789440 is an equidigital number, since it uses as much as digits as its factorization.

20598745789440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9769 (or 9719 counting only the distinct ones).

The product of its (nonzero) digits is 812851200, while the sum is 72.

The spelling of 20598745789440 in words is "twenty trillion, five hundred ninety-eight billion, seven hundred forty-five million, seven hundred eighty-nine thousand, four hundred forty".