20003555440116 has 96 divisors (see below), whose sum is σ = 52202892389760. Its totient is φ = 6624046598400.

The previous prime is 20003555440111. The next prime is 20003555440117. The reversal of 20003555440116 is 61104455530002.

20003555440116 is a `hidden beast` number, since 20 + 0 + 0 + 35 + 55 + 440 + 116 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003555440111) 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, 9049510 + ... + 11040866.

It is an arithmetic number, because the mean of its divisors is an integer number (543780129060).

Almost surely, 2^{20003555440116} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20003555440116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26101446194880).

20003555440116 is an abundant number, since it is smaller than the sum of its proper divisors (32199336949644).

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

20003555440116 is a wasteful number, since it uses less digits than its factorization.

20003555440116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991982 (or 1991974 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 20003555440116 in words is "twenty trillion, three billion, five hundred fifty-five million, four hundred forty thousand, one hundred sixteen".