20413253540 has 48 divisors (see below), whose sum is σ = 45520538112. Its totient is φ = 7662798336.

The previous prime is 20413253533. The next prime is 20413253579. The reversal of 20413253540 is 4535231402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31469 + ... + 204491.

It is an arithmetic number, because the mean of its divisors is an integer number (948344544).

Almost surely, 2^20413253540 is an apocalyptic number.

20413253540 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 20413253540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22760269056).

20413253540 is an abundant number, since it is smaller than the sum of its proper divisors (25107284572).

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

20413253540 is a wasteful number, since it uses less digits than its factorization.

20413253540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173396 (or 173394 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20413253540 its reverse (4535231402), we get a palindrome (24948484942).

The spelling of 20413253540 in words is "twenty billion, four hundred thirteen million, two hundred fifty-three thousand, five hundred forty".