11115623220 has 96 divisors (see below), whose sum is σ = 34150419072. Its totient is φ = 2684517888.

The previous prime is 11115623147. The next prime is 11115623231. The reversal of 11115623220 is 2232651111.

It is a happy number.

11115623220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93102 + ... + 175781.

It is an arithmetic number, because the mean of its divisors is an integer number (355733532).

Almost surely, 2^11115623220 is an apocalyptic number.

11115623220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11115623220 is an abundant number, since it is smaller than the sum of its proper divisors (23034795852).

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

11115623220 is a wasteful number, since it uses less digits than its factorization.

11115623220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268961 (or 268959 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The spelling of 11115623220 in words is "eleven billion, one hundred fifteen million, six hundred twenty-three thousand, two hundred twenty".