20178128300 has 72 divisors (see below), whose sum is σ = 48143585280. Its totient is φ = 7279675200.

The previous prime is 20178128281. The next prime is 20178128353. The reversal of 20178128300 is 382187102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67481 + ... + 211919.

Almost surely, 2^20178128300 is an apocalyptic number.

20178128300 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 20178128300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24071792640).

20178128300 is an abundant number, since it is smaller than the sum of its proper divisors (27965456980).

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

20178128300 is a wasteful number, since it uses less digits than its factorization.

20178128300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144591 (or 144584 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The spelling of 20178128300 in words is "twenty billion, one hundred seventy-eight million, one hundred twenty-eight thousand, three hundred".