20315303634023 has 4 divisors (see below), whose sum is σ = 20864365894440. Its totient is φ = 19766241373608.

The previous prime is 20315303634013. The next prime is 20315303634053. The reversal of 20315303634023 is 32043630351302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20315303634023 - 2⁸ = 20315303633767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315303634013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274531130153 + ... + 274531130226.

It is an arithmetic number, because the mean of its divisors is an integer number (5216091473610).

Almost surely, 2^{20315303634023} is an apocalyptic number.

20315303634023 is a deficient number, since it is larger than the sum of its proper divisors (549062260417).

20315303634023 is an equidigital number, since it uses as much as digits as its factorization.

20315303634023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549062260416.

The product of its (nonzero) digits is 116640, while the sum is 35.

Adding to 20315303634023 its reverse (32043630351302), we get a palindrome (52358933985325).

The spelling of 20315303634023 in words is "twenty trillion, three hundred fifteen billion, three hundred three million, six hundred thirty-four thousand, twenty-three".