20310340364531 has 16 divisors (see below), whose sum is σ = 23707141039104. Its totient is φ = 17037416029824.

The previous prime is 20310340364519. The next prime is 20310340364533. The reversal of 20310340364531 is 13546304301302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310340364531 is a prime.

It is a super-2 number, since 2×20310340364531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310340364491 and 20310340364500.

It is not an unprimeable number, because it can be changed into a prime (20310340364533) 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, 3497051 + ... + 7269803.

It is an arithmetic number, because the mean of its divisors is an integer number (1481696314944).

Almost surely, 2^{20310340364531} is an apocalyptic number.

20310340364531 is a deficient number, since it is larger than the sum of its proper divisors (3396800674573).

20310340364531 is a wasteful number, since it uses less digits than its factorization.

20310340364531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789170.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 20310340364531 its reverse (13546304301302), we get a palindrome (33856644665833).

The spelling of 20310340364531 in words is "twenty trillion, three hundred ten billion, three hundred forty million, three hundred sixty-four thousand, five hundred thirty-one".