20312123213 has 8 divisors (see below), whose sum is σ = 20407149120. Its totient is φ = 20217146400.

The previous prime is 20312123207. The next prime is 20312123219. The reversal of 20312123213 is 31232121302.

It is an interprime number because it is at equal distance from previous prime (20312123207) and next prime (20312123219).

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 20312123213 - 2⁴ = 20312123197 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 (20312123219) 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 7 ways as a sum of consecutive naturals, for example, 1015913 + ... + 1035713.

It is an arithmetic number, because the mean of its divisors is an integer number (2550893640).

Almost surely, 2^20312123213 is an apocalyptic number.

It is an amenable number.

20312123213 is a deficient number, since it is larger than the sum of its proper divisors (95025907).

20312123213 is a wasteful number, since it uses less digits than its factorization.

20312123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24547.

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

Adding to 20312123213 its reverse (31232121302), we get a palindrome (51544244515).

The spelling of 20312123213 in words is "twenty billion, three hundred twelve million, one hundred twenty-three thousand, two hundred thirteen".