11111923388 has 24 divisors (see below), whose sum is σ = 20120580480. Its totient is φ = 5363265600.

The previous prime is 11111923351. The next prime is 11111923399. The reversal of 11111923388 is 88332911111.

It is a happy number.

It is a super-3 number, since 3×11111923388³ (a number of 31 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 956213 + ... + 967763.

It is an arithmetic number, because the mean of its divisors is an integer number (838357520).

Almost surely, 2^11111923388 is an apocalyptic number.

It is an amenable number.

11111923388 is a deficient number, since it is larger than the sum of its proper divisors (9008657092).

11111923388 is a wasteful number, since it uses less digits than its factorization.

11111923388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19877 (or 19875 counting only the distinct ones).

The product of its digits is 10368, while the sum is 38.

The spelling of 11111923388 in words is "eleven billion, one hundred eleven million, nine hundred twenty-three thousand, three hundred eighty-eight".