20061501100 has 144 divisors (see below), whose sum is σ = 47837563200. Its totient is φ = 7268638720.

The previous prime is 20061501017. The next prime is 20061501113. The reversal of 20061501100 is 110516002.

It is a happy 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 47 ways as a sum of consecutive naturals, for example, 24797496 + ... + 24798304.

It is an arithmetic number, because the mean of its divisors is an integer number (332205300).

Almost surely, 2^20061501100 is an apocalyptic number.

20061501100 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 20061501100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23918781600).

20061501100 is an abundant number, since it is smaller than the sum of its proper divisors (27776062100).

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

20061501100 is a wasteful number, since it uses less digits than its factorization.

20061501100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372 (or 1365 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The spelling of 20061501100 in words is "twenty billion, sixty-one million, five hundred one thousand, one hundred".