20213233231 has 8 divisors (see below), whose sum is σ = 20239646544. Its totient is φ = 20186839680.

The previous prime is 20213233193. The next prime is 20213233253. The reversal of 20213233231 is 13233231202.

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 20213233231 - 2¹⁷ = 20213102159 is a prime.

It is a super-2 number, since 2×20213233231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213231231) 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, 3315496 + ... + 3321586.

It is an arithmetic number, because the mean of its divisors is an integer number (2529955818).

Almost surely, 2^20213233231 is an apocalyptic number.

20213233231 is a deficient number, since it is larger than the sum of its proper divisors (26413313).

20213233231 is a wasteful number, since it uses less digits than its factorization.

20213233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9881.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20213233231 its reverse (13233231202), we get a palindrome (33446464433).

The spelling of 20213233231 in words is "twenty billion, two hundred thirteen million, two hundred thirty-three thousand, two hundred thirty-one".