20110131030 has 48 divisors (see below), whose sum is σ = 53050867632. Its totient is φ = 4875182400.

The previous prime is 20110131023. The next prime is 20110131049. The reversal of 20110131030 is 3013101102.

It is a junction number, because it is equal to n+sod(n) for n = 20110130997 and 20110131015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2766361 + ... + 2773620.

It is an arithmetic number, because the mean of its divisors is an integer number (1105226409).

Almost surely, 2^20110131030 is an apocalyptic number.

20110131030 is an abundant number, since it is smaller than the sum of its proper divisors (32940736602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20110131030 is a wasteful number, since it uses less digits than its factorization.

20110131030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540013 (or 5540002 counting only the distinct ones).

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

Adding to 20110131030 its reverse (3013101102), we get a palindrome (23123232132).

The spelling of 20110131030 in words is "twenty billion, one hundred ten million, one hundred thirty-one thousand, thirty".