20132312030021 has 4 divisors (see below), whose sum is σ = 20203957268844. Its totient is φ = 20060666791200.

The previous prime is 20132312030011. The next prime is 20132312030023. The reversal of 20132312030021 is 12003021323102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10153852353121 + 9978459676900 = 3186511^2 + 3158870^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132312030021 - 2²⁶ = 20132244921157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20132312029975 and 20132312030002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132312030023) 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, 35822618990 + ... + 35822619551.

It is an arithmetic number, because the mean of its divisors is an integer number (5050989317211).

Almost surely, 2^{20132312030021} is an apocalyptic number.

It is an amenable number.

20132312030021 is a deficient number, since it is larger than the sum of its proper divisors (71645238823).

20132312030021 is an equidigital number, since it uses as much as digits as its factorization.

20132312030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71645238822.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20132312030021 its reverse (12003021323102), we get a palindrome (32135333353123).

The spelling of 20132312030021 in words is "twenty trillion, one hundred thirty-two billion, three hundred twelve million, thirty thousand, twenty-one".