30221020423 has 4 divisors (see below), whose sum is σ = 32968385928. Its totient is φ = 27473654920.

The previous prime is 30221020409. The next prime is 30221020439. The reversal of 30221020423 is 32402012203.

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

It is a cyclic number.

It is not a de Polignac number, because 30221020423 - 2²¹ = 30218923271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30221020423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221020493) 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, 1373682736 + ... + 1373682757.

It is an arithmetic number, because the mean of its divisors is an integer number (8242096482).

Almost surely, 2^30221020423 is an apocalyptic number.

30221020423 is a deficient number, since it is larger than the sum of its proper divisors (2747365505).

30221020423 is a wasteful number, since it uses less digits than its factorization.

30221020423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747365504.

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

Adding to 30221020423 its reverse (32402012203), we get a palindrome (62623032626).

The spelling of 30221020423 in words is "thirty billion, two hundred twenty-one million, twenty thousand, four hundred twenty-three".