20313131635533 has 16 divisors (see below), whose sum is σ = 30267016540992. Its totient is φ = 12010720848000.

The previous prime is 20313131635463. The next prime is 20313131635591. The reversal of 20313131635533 is 33553613131302.

It is not a de Polignac number, because 20313131635533 - 2⁹ = 20313131635021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20313131635491 and 20313131635500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313131235533) 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, 7506699178 + ... + 7506701883.

It is an arithmetic number, because the mean of its divisors is an integer number (1891688533812).

Almost surely, 2^{20313131635533} is an apocalyptic number.

It is an amenable number.

20313131635533 is a deficient number, since it is larger than the sum of its proper divisors (9953884905459).

20313131635533 is a wasteful number, since it uses less digits than its factorization.

20313131635533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15013401116.

The product of its (nonzero) digits is 218700, while the sum is 39.

Adding to 20313131635533 its reverse (33553613131302), we get a palindrome (53866744766835).

The spelling of 20313131635533 in words is "twenty trillion, three hundred thirteen billion, one hundred thirty-one million, six hundred thirty-five thousand, five hundred thirty-three".