20531334040000 has 560 divisors, whose sum is σ = 60119472010752. Its totient is φ = 6807476736000.

The previous prime is 20531334039989. The next prime is 20531334040057. The reversal of 20531334040000 is 4043313502.

It is a tau number, because it is divible by the number of its divisors (560).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1730114067 + ... + 1730125933.

Almost surely, 2^{20531334040000} is an apocalyptic number.

20531334040000 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 20531334040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30059736005376).

20531334040000 is an abundant number, since it is smaller than the sum of its proper divisors (39588137970752).

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

20531334040000 is a wasteful number, since it uses less digits than its factorization.

20531334040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12110 (or 12085 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20531334040000 its reverse (4043313502), we get a palindrome (20535377353502).

The spelling of 20531334040000 in words is "twenty trillion, five hundred thirty-one billion, three hundred thirty-four million, forty thousand".