20310506540550 has 144 divisors (see below), whose sum is σ = 57447743109120. Its totient is φ = 5130342360000.

The previous prime is 20310506540507. The next prime is 20310506540609. The reversal of 20310506540550 is 5504560501302.

20310506540550 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 0 + 5 + 0 + 65 + 40 + 550 = 666.

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 71 ways as a sum of consecutive naturals, for example, 60974955 + ... + 61307145.

It is an arithmetic number, because the mean of its divisors is an integer number (398942660480).

Almost surely, 2^{20310506540550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20310506540550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28723871554560).

20310506540550 is an abundant number, since it is smaller than the sum of its proper divisors (37137236568570).

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

20310506540550 is a wasteful number, since it uses less digits than its factorization.

20310506540550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339379 (or 339371 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 20310506540550 in words is "twenty trillion, three hundred ten billion, five hundred six million, five hundred forty thousand, five hundred fifty".