19910148 has 24 divisors (see below), whose sum is σ = 46871328. Its totient is φ = 6577536.

The previous prime is 19910147. The next prime is 19910159. The reversal of 19910148 is 84101991.

It is not an unprimeable number, because it can be changed into a prime (19910141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5986 + ... + 8697.

It is an arithmetic number, because the mean of its divisors is an integer number (1952972).

Almost surely, 2^19910148 is an apocalyptic number.

It is an amenable number.

19910148 is an abundant number, since it is smaller than the sum of its proper divisors (26961180).

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

19910148 is a wasteful number, since it uses less digits than its factorization.

19910148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14803 (or 14801 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 19910148 is about 4462.0788876935. The cubic root of 19910148 is about 271.0346583125.

The spelling of 19910148 in words is "nineteen million, nine hundred ten thousand, one hundred forty-eight".