30423442421 has 4 divisors (see below), whose sum is σ = 31165477644. Its totient is φ = 29681407200.

The previous prime is 30423442397. The next prime is 30423442433. The reversal of 30423442421 is 12424432403.

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 2571504100 + 27851938321 = 50710^2 + 166889^2 .

It is a cyclic number.

It is not a de Polignac number, because 30423442421 - 2¹⁰ = 30423441397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30423412421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371017550 + ... + 371017631.

It is an arithmetic number, because the mean of its divisors is an integer number (7791369411).

Almost surely, 2^30423442421 is an apocalyptic number.

It is an amenable number.

30423442421 is a deficient number, since it is larger than the sum of its proper divisors (742035223).

30423442421 is an equidigital number, since it uses as much as digits as its factorization.

30423442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742035222.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 30423442421 its reverse (12424432403), we get a palindrome (42847874824).

The spelling of 30423442421 in words is "thirty billion, four hundred twenty-three million, four hundred forty-two thousand, four hundred twenty-one".