20450541456340 has 12 divisors (see below), whose sum is σ = 42946137058356. Its totient is φ = 8180216582528.

The previous prime is 20450541456299. The next prime is 20450541456391. The reversal of 20450541456340 is 4365414505402.

It can be written as a sum of positive squares in 2 ways, for example, as 15285003436816 + 5165538019524 = 3909604^2 + 2272782^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511263536389 + ... + 511263536428.

It is an arithmetic number, because the mean of its divisors is an integer number (3578844754863).

Almost surely, 2^{20450541456340} is an apocalyptic number.

20450541456340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20450541456340 is an abundant number, since it is smaller than the sum of its proper divisors (22495595602016).

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

20450541456340 is a wasteful number, since it uses less digits than its factorization.

20450541456340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022527072826 (or 1022527072824 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 20450541456340 in words is "twenty trillion, four hundred fifty billion, five hundred forty-one million, four hundred fifty-six thousand, three hundred forty".