20312121310423 has 8 divisors (see below), whose sum is σ = 21506998890528. Its totient is φ = 19117248943104.

The previous prime is 20312121310363. The next prime is 20312121310477. The reversal of 20312121310423 is 32401312121302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20312121310423 - 2²⁵ = 20312087755991 is a prime.

It is a super-3 number, since 3×20312121310423³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312121310823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9085390 + ... + 11098132.

It is an arithmetic number, because the mean of its divisors is an integer number (2688374861316).

Almost surely, 2^{20312121310423} is an apocalyptic number.

20312121310423 is a deficient number, since it is larger than the sum of its proper divisors (1194877580105).

20312121310423 is a wasteful number, since it uses less digits than its factorization.

20312121310423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606393.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20312121310423 its reverse (32401312121302), we get a palindrome (52713433431725).

The spelling of 20312121310423 in words is "twenty trillion, three hundred twelve billion, one hundred twenty-one million, three hundred ten thousand, four hundred twenty-three".