21342004232 has 16 divisors (see below), whose sum is σ = 40017815100. Its totient is φ = 10670586880.

The previous prime is 21342004217. The next prime is 21342004237. The reversal of 21342004232 is 23240024312.

It can be written as a sum of positive squares in 2 ways, for example, as 20418695236 + 923308996 = 142894^2 + 30386^2 .

It is a super-2 number, since 2×21342004232² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21342004198 and 21342004207.

It is not an unprimeable number, because it can be changed into a prime (21342004237) 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, 345632 + ... + 402672.

Almost surely, 2^21342004232 is an apocalyptic number.

It is an amenable number.

21342004232 is a deficient number, since it is larger than the sum of its proper divisors (18675810868).

21342004232 is a wasteful number, since it uses less digits than its factorization.

21342004232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103816 (or 103812 counting only the distinct ones).

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

Adding to 21342004232 its reverse (23240024312), we get a palindrome (44582028544).

The spelling of 21342004232 in words is "twenty-one billion, three hundred forty-two million, four thousand, two hundred thirty-two".