20415144135 has 32 divisors (see below), whose sum is σ = 32792760000. Its totient is φ = 10845305856.

The previous prime is 20415144133. The next prime is 20415144173. The reversal of 20415144135 is 53144151402.

It is not a de Polignac number, because 20415144135 - 2¹ = 20415144133 is a prime.

It is a super-2 number, since 2×20415144135² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415144131) 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, 7479451 + ... + 7482179.

It is an arithmetic number, because the mean of its divisors is an integer number (1024773750).

Almost surely, 2^20415144135 is an apocalyptic number.

20415144135 is a deficient number, since it is larger than the sum of its proper divisors (12377615865).

20415144135 is a wasteful number, since it uses less digits than its factorization.

20415144135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4515.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 20415144135 its reverse (53144151402), we get a palindrome (73559295537).

The spelling of 20415144135 in words is "twenty billion, four hundred fifteen million, one hundred forty-four thousand, one hundred thirty-five".