30432224021 has 4 divisors (see below), whose sum is σ = 30701535852. Its totient is φ = 30162912192.

The previous prime is 30432223999. The next prime is 30432224023. The reversal of 30432224021 is 12042223403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12042223403 = 7 ⋅1720317629.

It can be written as a sum of positive squares in 2 ways, for example, as 3079695025 + 27352528996 = 55495^2 + 165386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30432224021 is a prime.

It is a super-2 number, since 2×30432224021² (a number of 22 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 (30432224023) 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, 134655746 + ... + 134655971.

It is an arithmetic number, because the mean of its divisors is an integer number (7675383963).

Almost surely, 2^30432224021 is an apocalyptic number.

It is an amenable number.

30432224021 is a deficient number, since it is larger than the sum of its proper divisors (269311831).

30432224021 is a wasteful number, since it uses less digits than its factorization.

30432224021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269311830.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 30432224021 its reverse (12042223403), we get a palindrome (42474447424).

The spelling of 30432224021 in words is "thirty billion, four hundred thirty-two million, two hundred twenty-four thousand, twenty-one".