20320023213 has 24 divisors (see below), whose sum is σ = 33857673408. Its totient is φ = 11502919872.

The previous prime is 20320023167. The next prime is 20320023221. The reversal of 20320023213 is 31232002302.

It is a happy number.

20320023213 is a `hidden beast` number, since 20 + 320 + 0 + 2 + 321 + 3 = 666.

It is not a de Polignac number, because 20320023213 - 2¹⁰ = 20320022189 is a prime.

It is a super-3 number, since 3×20320023213³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320023013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1500456 + ... + 1513937.

It is an arithmetic number, because the mean of its divisors is an integer number (1410736392).

Almost surely, 2^20320023213 is an apocalyptic number.

It is an amenable number.

20320023213 is a deficient number, since it is larger than the sum of its proper divisors (13537650195).

20320023213 is a wasteful number, since it uses less digits than its factorization.

20320023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014513 (or 3014510 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20320023213 its reverse (31232002302), we get a palindrome (51552025515).

The spelling of 20320023213 in words is "twenty billion, three hundred twenty million, twenty-three thousand, two hundred thirteen".