19842445 has 24 divisors (see below), whose sum is σ = 28577664. Its totient is φ = 12931776.

The previous prime is 19842443. The next prime is 19842463. The reversal of 19842445 is 54424891.

It is not a de Polignac number, because 19842445 - 2¹ = 19842443 is a prime.

It is a Duffinian number.

Its product of digits (46080) is a multiple of the sum of its prime divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19842443) 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 23 ways as a sum of consecutive naturals, for example, 126307 + ... + 126463.

It is an arithmetic number, because the mean of its divisors is an integer number (1190736).

Almost surely, 2^19842445 is an apocalyptic number.

It is an amenable number.

19842445 is a deficient number, since it is larger than the sum of its proper divisors (8735219).

19842445 is an equidigital number, since it uses as much as digits as its factorization.

19842445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 192 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 19842445 is about 4454.4859411609. The cubic root of 19842445 is about 270.7270982687.

The spelling of 19842445 in words is "nineteen million, eight hundred forty-two thousand, four hundred forty-five".