20315432530631 has 16 divisors (see below), whose sum is σ = 24043818188544. Its totient is φ = 16803350169984.

The previous prime is 20315432530621. The next prime is 20315432530637. The reversal of 20315432530631 is 13603523451302.

It is not a de Polignac number, because 20315432530631 - 2¹⁰ = 20315432529607 is a prime.

It is a super-2 number, since 2×20315432530631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315432530637) 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, 406560146 + ... + 406610111.

It is an arithmetic number, because the mean of its divisors is an integer number (1502738636784).

Almost surely, 2^{20315432530631} is an apocalyptic number.

20315432530631 is a deficient number, since it is larger than the sum of its proper divisors (3728385657913).

20315432530631 is an equidigital number, since it uses as much as digits as its factorization.

20315432530631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813170390.

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 20315432530631 its reverse (13603523451302), we get a palindrome (33918955981933).

The spelling of 20315432530631 in words is "twenty trillion, three hundred fifteen billion, four hundred thirty-two million, five hundred thirty thousand, six hundred thirty-one".