20501311200000 has 432 divisors, whose sum is σ = 68635522357920. Its totient is φ = 5432094720000.

The previous prime is 20501311199981. The next prime is 20501311200017. The reversal of 20501311200000 is 211310502.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 376772796 + ... + 376827204.

Almost surely, 2^{20501311200000} is an apocalyptic number.

20501311200000 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 20501311200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34317761178960).

20501311200000 is an abundant number, since it is smaller than the sum of its proper divisors (48134211157920).

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

20501311200000 is an frugal number, since it uses more digits than its factorization.

20501311200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54610 (or 54576 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 20501311200000 its reverse (211310502), we get a palindrome (20501522510502).

The spelling of 20501311200000 in words is "twenty trillion, five hundred one billion, three hundred eleven million, two hundred thousand".