42266018 has 4 divisors (see below), whose sum is σ = 63399030. Its totient is φ = 21133008.

The previous prime is 42265999. The next prime is 42266041. The reversal of 42266018 is 81066224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30658369 + 11607649 = 5537^2 + 3407^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566503 + ... + 10566506.

Almost surely, 2^42266018 is an apocalyptic number.

42266018 is a deficient number, since it is larger than the sum of its proper divisors (21133012).

42266018 is a wasteful number, since it uses less digits than its factorization.

42266018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21133011.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 42266018 is about 6501.2320370834. The cubic root of 42266018 is about 348.3349980207.

The spelling of 42266018 in words is "forty-two million, two hundred sixty-six thousand, eighteen".