30423031421 has 4 divisors (see below), whose sum is σ = 31472101500. Its totient is φ = 29373961344.

The previous prime is 30423031393. The next prime is 30423031487. The reversal of 30423031421 is 12413032403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12413032403 = 23 ⋅539697061.

It can be written as a sum of positive squares in 2 ways, for example, as 22495800196 + 7927231225 = 149986^2 + 89035^2 .

It is a cyclic number.

It is not a de Polignac number, because 30423031421 - 2³⁰ = 29349289597 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 (30423031321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524534996 + ... + 524535053.

It is an arithmetic number, because the mean of its divisors is an integer number (7868025375).

Almost surely, 2^30423031421 is an apocalyptic number.

It is an amenable number.

30423031421 is a deficient number, since it is larger than the sum of its proper divisors (1049070079).

30423031421 is a wasteful number, since it uses less digits than its factorization.

30423031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049070078.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 30423031421 its reverse (12413032403), we get a palindrome (42836063824).

The spelling of 30423031421 in words is "thirty billion, four hundred twenty-three million, thirty-one thousand, four hundred twenty-one".