19911148 has 24 divisors (see below), whose sum is σ = 37044000. Its totient is φ = 9331968.

The previous prime is 19911137. The next prime is 19911163. The reversal of 19911148 is 84111991.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23313 + ... + 24151.

It is an arithmetic number, because the mean of its divisors is an integer number (1543500).

Almost surely, 2^19911148 is an apocalyptic number.

It is an amenable number.

19911148 is a deficient number, since it is larger than the sum of its proper divisors (17132852).

19911148 is a wasteful number, since it uses less digits than its factorization.

19911148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1207 counting only the distinct ones).

The product of its digits is 2592, while the sum is 34.

The square root of 19911148 is about 4462.1909416788. The cubic root of 19911148 is about 271.0391958666.

The spelling of 19911148 in words is "nineteen million, nine hundred eleven thousand, one hundred forty-eight".