42018845 has 16 divisors (see below), whose sum is σ = 55194048. Its totient is φ = 30455040.

The previous prime is 42018817. The next prime is 42018863. The reversal of 42018845 is 54881024.

It is a happy number.

It is not a de Polignac number, because 42018845 - 2¹⁰ = 42017821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17402 + ... + 19668.

It is an arithmetic number, because the mean of its divisors is an integer number (3449628).

Almost surely, 2^42018845 is an apocalyptic number.

It is an amenable number.

42018845 is a deficient number, since it is larger than the sum of its proper divisors (13175203).

42018845 is a wasteful number, since it uses less digits than its factorization.

42018845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 42018845 is about 6482.1944586691. The cubic root of 42018845 is about 347.6546453833.

Adding to 42018845 its reverse (54881024), we get a palindrome (96899869).

The spelling of 42018845 in words is "forty-two million, eighteen thousand, eight hundred forty-five".