334420021 has 4 divisors (see below), whose sum is σ = 360144652. Its totient is φ = 308695392.

The previous prime is 334419959. The next prime is 334420043. The reversal of 334420021 is 120024433.

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

It can be written as a sum of positive squares in 2 ways, for example, as 105987025 + 228432996 = 10295^2 + 15114^2 .

It is a cyclic number.

It is not a de Polignac number, because 334420021 - 2⁹ = 334419509 is a prime.

It is a super-2 number, since 2×334420021² = 223673500891280882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (334420921) 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, 12862296 + ... + 12862321.

It is an arithmetic number, because the mean of its divisors is an integer number (90036163).

Almost surely, 2^334420021 is an apocalyptic number.

It is an amenable number.

334420021 is a deficient number, since it is larger than the sum of its proper divisors (25724631).

334420021 is a wasteful number, since it uses less digits than its factorization.

334420021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25724630.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 334420021 is about 18287.1545353562. The cubic root of 334420021 is about 694.1139241923.

Adding to 334420021 its reverse (120024433), we get a palindrome (454444454).

The spelling of 334420021 in words is "three hundred thirty-four million, four hundred twenty thousand, twenty-one".