20320020231 has 16 divisors (see below), whose sum is σ = 32593516800. Its totient is φ = 11000311488.

The previous prime is 20320020229. The next prime is 20320020233. The reversal of 20320020231 is 13202002302.

It is an interprime number because it is at equal distance from previous prime (20320020229) and next prime (20320020233).

It is not a de Polignac number, because 20320020231 - 2¹ = 20320020229 is a prime.

It is a super-2 number, since 2×20320020231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20320020231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320020233) 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 15 ways as a sum of consecutive naturals, for example, 25463286 + ... + 25464083.

It is an arithmetic number, because the mean of its divisors is an integer number (2037094800).

Almost surely, 2^20320020231 is an apocalyptic number.

20320020231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20320020231 is a deficient number, since it is larger than the sum of its proper divisors (12273496569).

20320020231 is a wasteful number, since it uses less digits than its factorization.

20320020231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50927398.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20320020231 its reverse (13202002302), we get a palindrome (33522022533).

The spelling of 20320020231 in words is "twenty billion, three hundred twenty million, twenty thousand, two hundred thirty-one".