20002105500 has 96 divisors (see below), whose sum is σ = 62726664000. Its totient is φ = 4923590400.

The previous prime is 20002105493. The next prime is 20002105523. The reversal of 20002105500 is 550120002.

It is a super-4 number, since 4×20002105500⁴ (a number of 42 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20002105500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 493375 + ... + 532374.

It is an arithmetic number, because the mean of its divisors is an integer number (653402750).

Almost surely, 2^20002105500 is an apocalyptic number.

20002105500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002105500 is an abundant number, since it is smaller than the sum of its proper divisors (42724558500).

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

20002105500 is a wasteful number, since it uses less digits than its factorization.

20002105500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025784 (or 1025772 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

Adding to 20002105500 its reverse (550120002), we get a palindrome (20552225502).

The spelling of 20002105500 in words is "twenty billion, two million, one hundred five thousand, five hundred".