20465110540 has 96 divisors (see below), whose sum is σ = 49887129600. Its totient is φ = 6906871296.

The previous prime is 20465110531. The next prime is 20465110541. The reversal of 20465110540 is 4501156402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 20465110499 and 20465110508.

It is not an unprimeable number, because it can be changed into a prime (20465110541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6120109 + ... + 6123451.

It is an arithmetic number, because the mean of its divisors is an integer number (519657600).

Almost surely, 2^20465110540 is an apocalyptic number.

20465110540 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 20465110540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24943564800).

20465110540 is an abundant number, since it is smaller than the sum of its proper divisors (29422019060).

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

20465110540 is a wasteful number, since it uses less digits than its factorization.

20465110540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031 (or 4029 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 20465110540 its reverse (4501156402), we get a palindrome (24966266942).

The spelling of 20465110540 in words is "twenty billion, four hundred sixty-five million, one hundred ten thousand, five hundred forty".