20213331231 has 8 divisors (see below), whose sum is σ = 26952292224. Its totient is φ = 13474962200.

The previous prime is 20213331197. The next prime is 20213331263. The reversal of 20213331231 is 13213331202.

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 20213331231 - 2¹⁸ = 20213069087 is a prime.

It is a super-2 number, since 2×20213331231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20213331198 and 20213331207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213331631) 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, 61011 + ... + 210116.

It is an arithmetic number, because the mean of its divisors is an integer number (3369036528).

Almost surely, 2^20213331231 is an apocalyptic number.

20213331231 is a deficient number, since it is larger than the sum of its proper divisors (6738960993).

20213331231 is a wasteful number, since it uses less digits than its factorization.

20213331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295981.

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

Adding to 20213331231 its reverse (13213331202), we get a palindrome (33426662433).

The spelling of 20213331231 in words is "twenty billion, two hundred thirteen million, three hundred thirty-one thousand, two hundred thirty-one".