20213230031213 has 4 divisors (see below), whose sum is σ = 20213248089888. Its totient is φ = 20213211972540.

The previous prime is 20213230031101. The next prime is 20213230031257. The reversal of 20213230031213 is 31213003231202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213230031213 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 (20213230031413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7230983 + ... + 9628788.

It is an arithmetic number, because the mean of its divisors is an integer number (5053312022472).

Almost surely, 2^{20213230031213} is an apocalyptic number.

It is an amenable number.

20213230031213 is a deficient number, since it is larger than the sum of its proper divisors (18058675).

20213230031213 is a wasteful number, since it uses less digits than its factorization.

20213230031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18058674.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20213230031213 its reverse (31213003231202), we get a palindrome (51426233262415).

The spelling of 20213230031213 in words is "twenty trillion, two hundred thirteen billion, two hundred thirty million, thirty-one thousand, two hundred thirteen".