21342322430 has 96 divisors (see below), whose sum is σ = 45880454592. Its totient is φ = 7099868160.

The previous prime is 21342322429. The next prime is 21342322439. The reversal of 21342322430 is 3422324312.

It is a super-2 number, since 2×21342322430² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 21342322430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342322439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1771487 + ... + 1783493.

It is an arithmetic number, because the mean of its divisors is an integer number (477921402).

Almost surely, 2^21342322430 is an apocalyptic number.

21342322430 is an abundant number, since it is smaller than the sum of its proper divisors (24538132162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21342322430 is a wasteful number, since it uses less digits than its factorization.

21342322430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12162 (or 12151 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21342322430 its reverse (3422324312), we get a palindrome (24764646742).

The spelling of 21342322430 in words is "twenty-one billion, three hundred forty-two million, three hundred twenty-two thousand, four hundred thirty".