20000155200 has 168 divisors, whose sum is σ = 65683900128. Its totient is φ = 5327953920.

The previous prime is 20000155169. The next prime is 20000155213. The reversal of 20000155200 is 255100002.

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 20000155200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7453059 + ... + 7455741.

It is an arithmetic number, because the mean of its divisors is an integer number (390975596).

Almost surely, 2^20000155200 is an apocalyptic number.

20000155200 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 20000155200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32841950064).

20000155200 is an abundant number, since it is smaller than the sum of its proper divisors (45683744928).

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

20000155200 is a wasteful number, since it uses less digits than its factorization.

20000155200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261 (or 4246 counting only the distinct ones).

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

Adding to 20000155200 its reverse (255100002), we get a palindrome (20255255202).

The spelling of 20000155200 in words is "twenty billion, one hundred fifty-five thousand, two hundred".