20103320145720 has 512 divisors, whose sum is σ = 72679824322560. Its totient is φ = 4349030400000.

The previous prime is 20103320145677. The next prime is 20103320145721. The reversal of 20103320145720 is 2754102330102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103320145721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6090068070 + ... + 6090071370.

It is an arithmetic number, because the mean of its divisors is an integer number (141952781880).

Almost surely, 2^{20103320145720} is an apocalyptic number.

20103320145720 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 20103320145720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36339912161280).

20103320145720 is an abundant number, since it is smaller than the sum of its proper divisors (52576504176840).

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

20103320145720 is a wasteful number, since it uses less digits than its factorization.

20103320145720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6567 (or 6563 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

Adding to 20103320145720 its reverse (2754102330102), we get a palindrome (22857422475822).

The spelling of 20103320145720 in words is "twenty trillion, one hundred three billion, three hundred twenty million, one hundred forty-five thousand, seven hundred twenty".