350018021 has 4 divisors (see below), whose sum is σ = 351349152. Its totient is φ = 348686892.

The previous prime is 350018017. The next prime is 350018029. The reversal of 350018021 is 120810053.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 350018021 - 2² = 350018017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 350017984 and 350018002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350018029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665171 + ... + 665696.

It is an arithmetic number, because the mean of its divisors is an integer number (87837288).

Almost surely, 2^350018021 is an apocalyptic number.

It is an amenable number.

350018021 is a deficient number, since it is larger than the sum of its proper divisors (1331131).

350018021 is a wasteful number, since it uses less digits than its factorization.

350018021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331130.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 350018021 is about 18708.7685591543. The cubic root of 350018021 is about 704.7419681770.

Adding to 350018021 its reverse (120810053), we get a palindrome (470828074).

The spelling of 350018021 in words is "three hundred fifty million, eighteen thousand, twenty-one".