20003123231 has 8 divisors (see below), whose sum is σ = 24619228704. Its totient is φ = 15826646880.

The previous prime is 20003123213. The next prime is 20003123243. The reversal of 20003123231 is 13232130002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003123231 is a prime.

It is a super-2 number, since 2×20003123231² (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 (20003123281) 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, 109907180 + ... + 109907361.

It is an arithmetic number, because the mean of its divisors is an integer number (3077403588).

Almost surely, 2^20003123231 is an apocalyptic number.

20003123231 is a deficient number, since it is larger than the sum of its proper divisors (4616105473).

20003123231 is a wasteful number, since it uses less digits than its factorization.

20003123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219814561.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20003123231 its reverse (13232130002), we get a palindrome (33235253233).

The spelling of 20003123231 in words is "twenty billion, three million, one hundred twenty-three thousand, two hundred thirty-one".