9019111938 has 32 divisors (see below), whose sum is σ = 19175624640. Its totient is φ = 2819937600.

The previous prime is 9019111903. The next prime is 9019111939. The reversal of 9019111938 is 8391119109.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 9019111938.

It is not an unprimeable number, because it can be changed into a prime (9019111939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380145 + ... + 403172.

It is an arithmetic number, because the mean of its divisors is an integer number (599238270).

Almost surely, 2^9019111938 is an apocalyptic number.

9019111938 is an abundant number, since it is smaller than the sum of its proper divisors (10156512702).

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

9019111938 is a wasteful number, since it uses less digits than its factorization.

9019111938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783442.

The product of its (nonzero) digits is 17496, while the sum is 42.

The square root of 9019111938 is about 94969.0051437836. The cubic root of 9019111938 is about 2081.5551684613. Note that the first 3 decimals are identical.

The spelling of 9019111938 in words is "nine billion, nineteen million, one hundred eleven thousand, nine hundred thirty-eight".