20310431435145 has 24 divisors (see below), whose sum is σ = 35204852713992. Its totient is φ = 10832197824000.

The previous prime is 20310431435143. The next prime is 20310431435171. The reversal of 20310431435145 is 54153413401302.

20310431435145 is a `hidden beast` number, since 2 + 0 + 3 + 104 + 31 + 4 + 3 + 514 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1331095220361 + 18979336214784 = 1153731^2 + 4356528^2 .

It is not a de Polignac number, because 20310431435145 - 2¹ = 20310431435143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20310431435143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28661505 + ... + 29361585.

It is an arithmetic number, because the mean of its divisors is an integer number (1466868863083).

Almost surely, 2^{20310431435145} is an apocalyptic number.

It is an amenable number.

20310431435145 is a deficient number, since it is larger than the sum of its proper divisors (14894421278847).

20310431435145 is a wasteful number, since it uses less digits than its factorization.

20310431435145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344793 (or 1344790 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 20310431435145 its reverse (54153413401302), we get a palindrome (74463844836447).

The spelling of 20310431435145 in words is "twenty trillion, three hundred ten billion, four hundred thirty-one million, four hundred thirty-five thousand, one hundred forty-five".