20415615321135 has 16 divisors (see below), whose sum is σ = 34085201232384. Its totient is φ = 10414922598432.

The previous prime is 20415615321131. The next prime is 20415615321139. The reversal of 20415615321135 is 53112351651402.

It is an interprime number because it is at equal distance from previous prime (20415615321131) and next prime (20415615321139).

It is not a de Polignac number, because 20415615321135 - 2² = 20415615321131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20415615321093 and 20415615321102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415615321131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29587847947 + ... + 29587848636.

It is an arithmetic number, because the mean of its divisors is an integer number (2130325077024).

Almost surely, 2^{20415615321135} is an apocalyptic number.

20415615321135 is a deficient number, since it is larger than the sum of its proper divisors (13669585911249).

20415615321135 is a wasteful number, since it uses less digits than its factorization.

20415615321135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59175696614.

The product of its (nonzero) digits is 108000, while the sum is 39.

Adding to 20415615321135 its reverse (53112351651402), we get a palindrome (73527966972537).

The spelling of 20415615321135 in words is "twenty trillion, four hundred fifteen billion, six hundred fifteen million, three hundred twenty-one thousand, one hundred thirty-five".