20331163145 has 16 divisors (see below), whose sum is σ = 25710227712. Its totient is φ = 15403713600.

The previous prime is 20331163057. The next prime is 20331163147. The reversal of 20331163145 is 54136113302.

It is not a de Polignac number, because 20331163145 - 2²⁰ = 20330114569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331163147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 863597 + ... + 886826.

It is an arithmetic number, because the mean of its divisors is an integer number (1606889232).

Almost surely, 2^20331163145 is an apocalyptic number.

It is an amenable number.

20331163145 is a deficient number, since it is larger than the sum of its proper divisors (5379064567).

20331163145 is a wasteful number, since it uses less digits than its factorization.

20331163145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750552.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 20331163145 its reverse (54136113302), we get a palindrome (74467276447).

The spelling of 20331163145 in words is "twenty billion, three hundred thirty-one million, one hundred sixty-three thousand, one hundred forty-five".