20312013213 has 24 divisors (see below), whose sum is σ = 31062326880. Its totient is φ = 12754467360.

The previous prime is 20312013209. The next prime is 20312013263. The reversal of 20312013213 is 31231021302.

It is not a de Polignac number, because 20312013213 - 2² = 20312013209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312013263) 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 23 ways as a sum of consecutive naturals, for example, 313723 + ... + 372888.

It is an arithmetic number, because the mean of its divisors is an integer number (1294263620).

Almost surely, 2^20312013213 is an apocalyptic number.

It is an amenable number.

20312013213 is a deficient number, since it is larger than the sum of its proper divisors (10750313667).

20312013213 is a wasteful number, since it uses less digits than its factorization.

20312013213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686809 (or 686806 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20312013213 its reverse (31231021302), we get a palindrome (51543034515).

The spelling of 20312013213 in words is "twenty billion, three hundred twelve million, thirteen thousand, two hundred thirteen".