20553012520000 has 280 divisors, whose sum is σ = 53247384032832. Its totient is φ = 7853894400000.

The previous prime is 20553012519983. The next prime is 20553012520003. The reversal of 20553012520000 is 2521035502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20553012520003) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 755306395 + ... + 755333605.

Almost surely, 2^{20553012520000} is an apocalyptic number.

20553012520000 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 20553012520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26623692016416).

20553012520000 is an abundant number, since it is smaller than the sum of its proper divisors (32694371512832).

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

20553012520000 is an equidigital number, since it uses as much as digits as its factorization.

20553012520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28087 (or 28062 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 20553012520000 its reverse (2521035502), we get a palindrome (20555533555502).

The spelling of 20553012520000 in words is "twenty trillion, five hundred fifty-three billion, twelve million, five hundred twenty thousand".