19485855 has 24 divisors (see below), whose sum is σ = 33984288. Its totient is φ = 10328256.

The previous prime is 19485847. The next prime is 19485863. The reversal of 19485855 is 55858491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19485847) and next prime (19485863).

It is not a de Polignac number, because 19485855 - 2³ = 19485847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 19485855.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6534 + ... + 9036.

It is an arithmetic number, because the mean of its divisors is an integer number (1416012).

Almost surely, 2^19485855 is an apocalyptic number.

19485855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19485855 is a deficient number, since it is larger than the sum of its proper divisors (14498433).

19485855 is a wasteful number, since it uses less digits than its factorization.

19485855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687 (or 2684 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 19485855 is about 4414.2785367487. The cubic root of 19485855 is about 269.0955332014.

The spelling of 19485855 in words is "nineteen million, four hundred eighty-five thousand, eight hundred fifty-five".