20310645353511 has 16 divisors (see below), whose sum is σ = 27102779432960. Its totient is φ = 13529471342400.

The previous prime is 20310645353501. The next prime is 20310645353519. The reversal of 20310645353511 is 11535354601302.

It is not a de Polignac number, because 20310645353511 - 2⁶ = 20310645353447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20310645353511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310645353519) 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, 269323536 + ... + 269398938.

It is an arithmetic number, because the mean of its divisors is an integer number (1693923714560).

Almost surely, 2^{20310645353511} is an apocalyptic number.

20310645353511 is a deficient number, since it is larger than the sum of its proper divisors (6792134079449).

20310645353511 is a wasteful number, since it uses less digits than its factorization.

20310645353511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146886.

The product of its (nonzero) digits is 162000, while the sum is 39.

Adding to 20310645353511 its reverse (11535354601302), we get a palindrome (31845999954813).

The spelling of 20310645353511 in words is "twenty trillion, three hundred ten billion, six hundred forty-five million, three hundred fifty-three thousand, five hundred eleven".