19842255 has 12 divisors (see below), whose sum is σ = 34393320. Its totient is φ = 10582512.

The previous prime is 19842241. The next prime is 19842259. The reversal of 19842255 is 55224891.

It is not a de Polignac number, because 19842255 - 2⁴ = 19842239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19842259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220425 + ... + 220514.

It is an arithmetic number, because the mean of its divisors is an integer number (2866110).

Almost surely, 2^19842255 is an apocalyptic number.

19842255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19842255 is a deficient number, since it is larger than the sum of its proper divisors (14551065).

19842255 is a wasteful number, since it uses less digits than its factorization.

19842255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440950 (or 440947 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 19842255 is about 4454.4646142943. The cubic root of 19842255 is about 270.7262341563.

The spelling of 19842255 in words is "nineteen million, eight hundred forty-two thousand, two hundred fifty-five".