20523500030000 has 200 divisors, whose sum is σ = 55671724408080. Its totient is φ = 7261384320000.

The previous prime is 20523500029937. The next prime is 20523500030021. The reversal of 20523500030000 is 3000532502.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1548686 + ... + 6591314.

Almost surely, 2^{20523500030000} is an apocalyptic number.

20523500030000 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 20523500030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27835862204040).

20523500030000 is an abundant number, since it is smaller than the sum of its proper divisors (35148224378080).

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

20523500030000 is a wasteful number, since it uses less digits than its factorization.

20523500030000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042705 (or 5042684 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

Adding to 20523500030000 its reverse (3000532502), we get a palindrome (20526500562502).

The spelling of 20523500030000 in words is "twenty trillion, five hundred twenty-three billion, five hundred million, thirty thousand".