20331312213 has 8 divisors (see below), whose sum is σ = 27130586688. Its totient is φ = 13543122944.

The previous prime is 20331312191. The next prime is 20331312233. The reversal of 20331312213 is 31221313302.

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 20331312213 - 2⁵ = 20331312181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20331312213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331312233) 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, 2767020 + ... + 2774357.

It is an arithmetic number, because the mean of its divisors is an integer number (3391323336).

Almost surely, 2^20331312213 is an apocalyptic number.

It is an amenable number.

20331312213 is a deficient number, since it is larger than the sum of its proper divisors (6799274475).

20331312213 is a wasteful number, since it uses less digits than its factorization.

20331312213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5542603.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20331312213 its reverse (31221313302), we get a palindrome (51552625515).

The spelling of 20331312213 in words is "twenty billion, three hundred thirty-one million, three hundred twelve thousand, two hundred thirteen".