42018520 has 32 divisors (see below), whose sum is σ = 95745600. Its totient is φ = 16593408.

The previous prime is 42018511. The next prime is 42018527. The reversal of 42018520 is 2581024.

It is a junction number, because it is equal to n+sod(n) for n = 42018491 and 42018500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42018527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3489 + ... + 9808.

It is an arithmetic number, because the mean of its divisors is an integer number (2992050).

Almost surely, 2^42018520 is an apocalyptic number.

42018520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42018520 is an abundant number, since it is smaller than the sum of its proper divisors (53727080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42018520 is a wasteful number, since it uses less digits than its factorization.

42018520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13387 (or 13383 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 42018520 is about 6482.1693899496. The cubic root of 42018520 is about 347.6537490549.

Adding to 42018520 its reverse (2581024), we get a palindrome (44599544).

It can be divided in two parts, 4201 and 8520, that added together give a palindrome (12721).

The spelling of 42018520 in words is "forty-two million, eighteen thousand, five hundred twenty".