20615432113155 has 32 divisors (see below), whose sum is σ = 36010831281408. Its totient is φ = 9987713360000.

The previous prime is 20615432113147. The next prime is 20615432113207. The reversal of 20615432113155 is 55131123451602.

It is not a de Polignac number, because 20615432113155 - 2³ = 20615432113147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47581596 + ... + 48012905.

It is an arithmetic number, because the mean of its divisors is an integer number (1125338477544).

Almost surely, 2^{20615432113155} is an apocalyptic number.

20615432113155 is a deficient number, since it is larger than the sum of its proper divisors (15395399168253).

20615432113155 is a wasteful number, since it uses less digits than its factorization.

20615432113155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95595827.

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

Adding to 20615432113155 its reverse (55131123451602), we get a palindrome (75746555564757).

The spelling of 20615432113155 in words is "twenty trillion, six hundred fifteen billion, four hundred thirty-two million, one hundred thirteen thousand, one hundred fifty-five".