20413051540 has 96 divisors (see below), whose sum is σ = 51737978880. Its totient is φ = 6613723776.

The previous prime is 20413051507. The next prime is 20413051559. The reversal of 20413051540 is 4515031402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229071 + ... + 305449.

It is an arithmetic number, because the mean of its divisors is an integer number (538937280).

Almost surely, 2^20413051540 is an apocalyptic number.

20413051540 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 20413051540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25868989440).

20413051540 is an abundant number, since it is smaller than the sum of its proper divisors (31324927340).

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

20413051540 is a wasteful number, since it uses less digits than its factorization.

20413051540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76501 (or 76499 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20413051540 its reverse (4515031402), we get a palindrome (24928082942).

The spelling of 20413051540 in words is "twenty billion, four hundred thirteen million, fifty-one thousand, five hundred forty".