20345112480 has 384 divisors, whose sum is σ = 81036619776. Its totient is φ = 4167475200.

The previous prime is 20345112443. The next prime is 20345112503. The reversal of 20345112480 is 8421154302.

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

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2620284 + ... + 2628036.

It is an arithmetic number, because the mean of its divisors is an integer number (211032864).

Almost surely, 2^20345112480 is an apocalyptic number.

20345112480 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 20345112480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40518309888).

20345112480 is an abundant number, since it is smaller than the sum of its proper divisors (60691507296).

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

20345112480 is a wasteful number, since it uses less digits than its factorization.

20345112480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7860 (or 7852 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 20345112480 its reverse (8421154302), we get a palindrome (28766266782).

The spelling of 20345112480 in words is "twenty billion, three hundred forty-five million, one hundred twelve thousand, four hundred eighty".