20002356231 has 32 divisors (see below), whose sum is σ = 31642652160. Its totient is φ = 11079312000.

The previous prime is 20002356223. The next prime is 20002356239. The reversal of 20002356231 is 13265320002.

It is an interprime number because it is at equal distance from previous prime (20002356223) and next prime (20002356239).

It is not a de Polignac number, because 20002356231 - 2³ = 20002356223 is a prime.

It is a super-2 number, since 2×20002356231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002356239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187491 + ... + 274148.

It is an arithmetic number, because the mean of its divisors is an integer number (988832880).

Almost surely, 2^20002356231 is an apocalyptic number.

20002356231 is a deficient number, since it is larger than the sum of its proper divisors (11640295929).

20002356231 is a wasteful number, since it uses less digits than its factorization.

20002356231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461767.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 20002356231 its reverse (13265320002), we get a palindrome (33267676233).

The spelling of 20002356231 in words is "twenty billion, two million, three hundred fifty-six thousand, two hundred thirty-one".