20011103031 has 16 divisors (see below), whose sum is σ = 28110992000. Its totient is φ = 12627236448.

The previous prime is 20011102999. The next prime is 20011103059. The reversal of 20011103031 is 13030111002.

It is not a de Polignac number, because 20011103031 - 2⁵ = 20011102999 is a prime.

It is a super-2 number, since 2×20011103031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011102998 and 20011103016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011103731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93481 + ... + 220818.

It is an arithmetic number, because the mean of its divisors is an integer number (1756937000).

Almost surely, 2^20011103031 is an apocalyptic number.

20011103031 is a deficient number, since it is larger than the sum of its proper divisors (8099888969).

20011103031 is a wasteful number, since it uses less digits than its factorization.

20011103031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315438.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 20011103031 its reverse (13030111002), we get a palindrome (33041214033).

The spelling of 20011103031 in words is "twenty billion, eleven million, one hundred three thousand, thirty-one".