20321144115 has 16 divisors (see below), whose sum is σ = 33927475968. Its totient is φ = 10366728416.

The previous prime is 20321144113. The next prime is 20321144131. The reversal of 20321144115 is 51144112302.

It is a cyclic number.

It is not a de Polignac number, because 20321144115 - 2¹ = 20321144113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321144113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29450589 + ... + 29451278.

It is an arithmetic number, because the mean of its divisors is an integer number (2120467248).

Almost surely, 2^20321144115 is an apocalyptic number.

20321144115 is a deficient number, since it is larger than the sum of its proper divisors (13606331853).

20321144115 is a wasteful number, since it uses less digits than its factorization.

20321144115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58901898.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 20321144115 its reverse (51144112302), we get a palindrome (71465256417).

The spelling of 20321144115 in words is "twenty billion, three hundred twenty-one million, one hundred forty-four thousand, one hundred fifteen".