20113533052500 has 60 divisors (see below), whose sum is σ = 58645698794144. Its totient is φ = 5363608812000.

The previous prime is 20113533052493. The next prime is 20113533052523. The reversal of 20113533052500 is 525033531102.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1340894704 + ... + 1340909703.

Almost surely, 2^{20113533052500} is an apocalyptic number.

20113533052500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113533052500 is an abundant number, since it is smaller than the sum of its proper divisors (38532165741644).

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

20113533052500 is a wasteful number, since it uses less digits than its factorization.

20113533052500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681804434 (or 2681804417 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 20113533052500 its reverse (525033531102), we get a palindrome (20638566583602).

The spelling of 20113533052500 in words is "twenty trillion, one hundred thirteen billion, five hundred thirty-three million, fifty-two thousand, five hundred".