42621318 has 24 divisors (see below), whose sum is σ = 92886768. Its totient is φ = 14123952.

The previous prime is 42621317. The next prime is 42621331. The reversal of 42621318 is 81312624.

42621318 is a `hidden beast` number, since 4 + 2 + 621 + 31 + 8 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42621291 and 42621300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42621317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3730 + ... + 9957.

It is an arithmetic number, because the mean of its divisors is an integer number (3870282).

Almost surely, 2^42621318 is an apocalyptic number.

42621318 is an abundant number, since it is smaller than the sum of its proper divisors (50265450).

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

42621318 is a wasteful number, since it uses less digits than its factorization.

42621318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13868 (or 13865 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 42621318 is about 6528.5004403768. The cubic root of 42621318 is about 349.3083429167.

The spelling of 42621318 in words is "forty-two million, six hundred twenty-one thousand, three hundred eighteen".