19905048 has 32 divisors (see below), whose sum is σ = 55292400. Its totient is φ = 6634944.

The previous prime is 19905047. The next prime is 19905073. The reversal of 19905048 is 84050991.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19905043) 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 7 ways as a sum of consecutive naturals, for example, 45861 + ... + 46292.

Almost surely, 2^19905048 is an apocalyptic number.

19905048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19905048 is an abundant number, since it is smaller than the sum of its proper divisors (35387352).

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

19905048 is a wasteful number, since it uses less digits than its factorization.

19905048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92168 (or 92158 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 19905048 is about 4461.5073685919. The cubic root of 19905048 is about 271.0115144230.

The spelling of 19905048 in words is "nineteen million, nine hundred five thousand, forty-eight".