20415421260 has 288 divisors, whose sum is σ = 68132256192. Its totient is φ = 4917749760.

The previous prime is 20415421259. The next prime is 20415421331. The reversal of 20415421260 is 6212451402.

20415421260 is a `hidden beast` number, since 20 + 41 + 542 + 1 + 2 + 60 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30885330 + ... + 30885990.

It is an arithmetic number, because the mean of its divisors is an integer number (236570334).

Almost surely, 2^20415421260 is an apocalyptic number.

20415421260 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 20415421260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34066128096).

20415421260 is an abundant number, since it is smaller than the sum of its proper divisors (47716834932).

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

20415421260 is a wasteful number, since it uses less digits than its factorization.

20415421260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 948 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 20415421260 its reverse (6212451402), we get a palindrome (26627872662).

The spelling of 20415421260 in words is "twenty billion, four hundred fifteen million, four hundred twenty-one thousand, two hundred sixty".