918020242 has 4 divisors (see below), whose sum is σ = 1377030366. Its totient is φ = 459010120.

The previous prime is 918020239. The next prime is 918020251. The reversal of 918020242 is 242020819.

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., 903663721 + 14356521 = 30061^2 + 3789^2 .

It is a super-4 number, since 4×918020242⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 918020242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 229505059 + ... + 229505062.

Almost surely, 2^918020242 is an apocalyptic number.

918020242 is a deficient number, since it is larger than the sum of its proper divisors (459010124).

918020242 is a wasteful number, since it uses less digits than its factorization.

918020242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459010123.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 918020242 is about 30298.8488560209. The cubic root of 918020242 is about 971.8906837101.

The spelling of 918020242 in words is "nine hundred eighteen million, twenty thousand, two hundred forty-two".