20541801380 has 12 divisors (see below), whose sum is σ = 43137782940. Its totient is φ = 8216720544.

The previous prime is 20541801317. The next prime is 20541801383. The reversal of 20541801380 is 8310814502.

It can be written as a sum of positive squares in 2 ways, for example, as 12431358016 + 8110443364 = 111496^2 + 90058^2 .

It is not an unprimeable number, because it can be changed into a prime (20541801383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513545015 + ... + 513545054.

It is an arithmetic number, because the mean of its divisors is an integer number (3594815245).

Almost surely, 2^20541801380 is an apocalyptic number.

20541801380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20541801380 is an abundant number, since it is smaller than the sum of its proper divisors (22595981560).

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

20541801380 is a wasteful number, since it uses less digits than its factorization.

20541801380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027090078 (or 1027090076 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 20541801380 in words is "twenty billion, five hundred forty-one million, eight hundred one thousand, three hundred eighty".