20081554608250 has 64 divisors (see below), whose sum is σ = 40219941116160. Its totient is φ = 7485100488000.

The previous prime is 20081554608233. The next prime is 20081554608259. The reversal of 20081554608250 is 5280645518002.

It is a self number, because there is not a number n which added to its sum of digits gives 20081554608250.

It is not an unprimeable number, because it can be changed into a prime (20081554608259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34363494 + ... + 34942993.

It is an arithmetic number, because the mean of its divisors is an integer number (628436579940).

Almost surely, 2^{20081554608250} is an apocalyptic number.

20081554608250 is an abundant number, since it is smaller than the sum of its proper divisors (20138386507910).

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

20081554608250 is a wasteful number, since it uses less digits than its factorization.

20081554608250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69306584 (or 69306574 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 46.

The spelling of 20081554608250 in words is "twenty trillion, eighty-one billion, five hundred fifty-four million, six hundred eight thousand, two hundred fifty".