21442430302 has 4 divisors (see below), whose sum is σ = 32163645456. Its totient is φ = 10721215150.

The previous prime is 21442430299. The next prime is 21442430309. The reversal of 21442430302 is 20303424412.

It is a happy number.

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

It is a super-2 number, since 2×21442430302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442430309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360607574 + ... + 5360607577.

It is an arithmetic number, because the mean of its divisors is an integer number (8040911364).

Almost surely, 2^21442430302 is an apocalyptic number.

21442430302 is a deficient number, since it is larger than the sum of its proper divisors (10721215154).

21442430302 is a wasteful number, since it uses less digits than its factorization.

21442430302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10721215153.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21442430302 its reverse (20303424412), we get a palindrome (41745854714).

The spelling of 21442430302 in words is "twenty-one billion, four hundred forty-two million, four hundred thirty thousand, three hundred two".