20111031110 has 32 divisors (see below), whose sum is σ = 38337730272. Its totient is φ = 7569538560.

The previous prime is 20111031107. The next prime is 20111031131. The reversal of 20111031110 is 1113011102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20111031091 and 20111031100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979409 + ... + 999731.

It is an arithmetic number, because the mean of its divisors is an integer number (1198054071).

Almost surely, 2^20111031110 is an apocalyptic number.

20111031110 is a deficient number, since it is larger than the sum of its proper divisors (18226699162).

20111031110 is a wasteful number, since it uses less digits than its factorization.

20111031110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26168.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 20111031110 its reverse (1113011102), we get a palindrome (21224042212).

The spelling of 20111031110 in words is "twenty billion, one hundred eleven million, thirty-one thousand, one hundred ten".