20310121545040 has 40 divisors (see below), whose sum is σ = 48497276723400. Its totient is φ = 7904479735296.

The previous prime is 20310121545031. The next prime is 20310121545053. The reversal of 20310121545040 is 4054512101302.

It can be written as a sum of positive squares in 4 ways, for example, as 9832263294736 + 10477858250304 = 3135644^2 + 3236952^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3430760815 + ... + 3430766734.

It is an arithmetic number, because the mean of its divisors is an integer number (1212431918085).

Almost surely, 2^{20310121545040} is an apocalyptic number.

20310121545040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310121545040 is an abundant number, since it is smaller than the sum of its proper divisors (28187155178360).

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

20310121545040 is a wasteful number, since it uses less digits than its factorization.

20310121545040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861527599 (or 6861527593 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 20310121545040 its reverse (4054512101302), we get a palindrome (24364633646342).

The spelling of 20310121545040 in words is "twenty trillion, three hundred ten billion, one hundred twenty-one million, five hundred forty-five thousand, forty".