306213604646021 has 8 divisors (see below), whose sum is σ = 306911976719040. Its totient is φ = 305515517806368.

The previous prime is 306213604646003. The next prime is 306213604646039. The reversal of 306213604646021 is 120646406312603.

It is an interprime number because it is at equal distance from previous prime (306213604646003) and next prime (306213604646039).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306213604646021 is a prime.

It is a super-2 number, since 2×306213604646021² (a number of 30 digits) 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 (306213604646051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69158711 + ... + 73453076.

It is an arithmetic number, because the mean of its divisors is an integer number (38363997089880).

Almost surely, 2^{306213604646021} is an apocalyptic number.

It is an amenable number.

306213604646021 is a deficient number, since it is larger than the sum of its proper divisors (698372073019).

306213604646021 is a wasteful number, since it uses less digits than its factorization.

306213604646021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142616683.

The product of its (nonzero) digits is 746496, while the sum is 44.

The spelling of 306213604646021 in words is "three hundred six trillion, two hundred thirteen billion, six hundred four million, six hundred forty-six thousand, twenty-one".