19845345 has 16 divisors (see below), whose sum is σ = 34195392. Its totient is φ = 9769920.

The previous prime is 19845337. The next prime is 19845347. The reversal of 19845345 is 54354891.

It is not a de Polignac number, because 19845345 - 2³ = 19845337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (19845347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50691 + ... + 51080.

It is an arithmetic number, because the mean of its divisors is an integer number (2137212).

Almost surely, 2^19845345 is an apocalyptic number.

19845345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19845345 is a deficient number, since it is larger than the sum of its proper divisors (14350047).

19845345 is a wasteful number, since it uses less digits than its factorization.

19845345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101792.

The product of its digits is 86400, while the sum is 39.

The square root of 19845345 is about 4454.8114438212. The cubic root of 19845345 is about 270.7402866693.

The spelling of 19845345 in words is "nineteen million, eight hundred forty-five thousand, three hundred forty-five".