21342430132 has 24 divisors (see below), whose sum is σ = 38527733664. Its totient is φ = 10337048352.

The previous prime is 21342430127. The next prime is 21342430189. The reversal of 21342430132 is 23103424312.

It is a super-4 number, since 4×21342430132⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a junction number, because it is equal to n+sod(n) for n = 21342430097 and 21342430106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284038 + ... + 351229.

It is an arithmetic number, because the mean of its divisors is an integer number (1605322236).

Almost surely, 2^21342430132 is an apocalyptic number.

It is an amenable number.

21342430132 is a deficient number, since it is larger than the sum of its proper divisors (17185303532).

21342430132 is a wasteful number, since it uses less digits than its factorization.

21342430132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635535 (or 635533 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21342430132 its reverse (23103424312), we get a palindrome (44445854444).

The spelling of 21342430132 in words is "twenty-one billion, three hundred forty-two million, four hundred thirty thousand, one hundred thirty-two".