20555314331340 has 96 divisors (see below), whose sum is σ = 59575910546880. Its totient is φ = 5289169048576.

The previous prime is 20555314331333. The next prime is 20555314331341. The reversal of 20555314331340 is 4313341355502.

It is not an unprimeable number, because it can be changed into a prime (20555314331341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 759867 + ... + 6456626.

It is an arithmetic number, because the mean of its divisors is an integer number (620582401530).

Almost surely, 2^{20555314331340} is an apocalyptic number.

20555314331340 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 20555314331340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29787955273440).

20555314331340 is an abundant number, since it is smaller than the sum of its proper divisors (39020596215540).

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

20555314331340 is a wasteful number, since it uses less digits than its factorization.

20555314331340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7218171 (or 7218169 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 39.

Adding to 20555314331340 its reverse (4313341355502), we get a palindrome (24868655686842).

The spelling of 20555314331340 in words is "twenty trillion, five hundred fifty-five billion, three hundred fourteen million, three hundred thirty-one thousand, three hundred forty".