20031023111 has 8 divisors (see below), whose sum is σ = 22442620944. Its totient is φ = 17717857920.

The previous prime is 20031023069. The next prime is 20031023119. The reversal of 20031023111 is 11132013002.

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 20031023111 - 2¹⁰ = 20031022087 is a prime.

It is a super-2 number, since 2×20031023111² (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 (20031023119) 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, 24607730 + ... + 24608543.

It is an arithmetic number, because the mean of its divisors is an integer number (2805327618).

Almost surely, 2^20031023111 is an apocalyptic number.

20031023111 is a deficient number, since it is larger than the sum of its proper divisors (2411597833).

20031023111 is a wasteful number, since it uses less digits than its factorization.

20031023111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49216321.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20031023111 its reverse (11132013002), we get a palindrome (31163036113).

The spelling of 20031023111 in words is "twenty billion, thirty-one million, twenty-three thousand, one hundred eleven".