20450515604340 has 96 divisors (see below), whose sum is σ = 57705094250496. Its totient is φ = 5411227835520.

The previous prime is 20450515604291. The next prime is 20450515604381. The reversal of 20450515604340 is 4340651505402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71406669 + ... + 71692491.

It is an arithmetic number, because the mean of its divisors is an integer number (601094731776).

Almost surely, 2^{20450515604340} is an apocalyptic number.

20450515604340 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 20450515604340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28852547125248).

20450515604340 is an abundant number, since it is smaller than the sum of its proper divisors (37254578646156).

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

20450515604340 is a wasteful number, since it uses less digits than its factorization.

20450515604340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295069 (or 295067 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 20450515604340 in words is "twenty trillion, four hundred fifty billion, five hundred fifteen million, six hundred four thousand, three hundred forty".