20111230040 has 64 divisors (see below), whose sum is σ = 49740894720. Its totient is φ = 7257328000.

The previous prime is 20111230033. The next prime is 20111230043. The reversal of 20111230040 is 4003211102.

It is a junction number, because it is equal to n+sod(n) for n = 20111229997 and 20111230024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111230043) 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, 116816 + ... + 232095.

It is an arithmetic number, because the mean of its divisors is an integer number (777201480).

Almost surely, 2^20111230040 is an apocalyptic number.

20111230040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111230040 is an abundant number, since it is smaller than the sum of its proper divisors (29629664680).

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

20111230040 is a wasteful number, since it uses less digits than its factorization.

20111230040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349064 (or 349060 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20111230040 its reverse (4003211102), we get a palindrome (24114441142).

The spelling of 20111230040 in words is "twenty billion, one hundred eleven million, two hundred thirty thousand, forty".