20415421541115 has 32 divisors (see below), whose sum is σ = 38204297625600. Its totient is φ = 10315160356320.

The previous prime is 20415421541101. The next prime is 20415421541117. The reversal of 20415421541115 is 51114512451402.

20415421541115 is a `hidden beast` number, since 2 + 0 + 4 + 15 + 4 + 215 + 411 + 15 = 666.

It is not a de Polignac number, because 20415421541115 - 2²² = 20415417346811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20415421541115.

It is not an unprimeable number, because it can be changed into a prime (20415421541117) 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, 3979611771 + ... + 3979616900.

It is an arithmetic number, because the mean of its divisors is an integer number (1193884300800).

Almost surely, 2^{20415421541115} is an apocalyptic number.

20415421541115 is a deficient number, since it is larger than the sum of its proper divisors (17788876084485).

20415421541115 is a wasteful number, since it uses less digits than its factorization.

20415421541115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7959228704 (or 7959228698 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

Adding to 20415421541115 its reverse (51114512451402), we get a palindrome (71529933992517).

The spelling of 20415421541115 in words is "twenty trillion, four hundred fifteen billion, four hundred twenty-one million, five hundred forty-one thousand, one hundred fifteen".