21242334032 has 20 divisors (see below), whose sum is σ = 42269375316. Its totient is φ = 10334108160.

The previous prime is 21242334031. The next prime is 21242334083. The reversal of 21242334032 is 23043324212.

It can be written as a sum of positive squares in 2 ways, for example, as 14717571856 + 6524762176 = 121316^2 + 80776^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21242333992 and 21242334010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242334031) 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, 17940569 + ... + 17941752.

Almost surely, 2^21242334032 is an apocalyptic number.

It is an amenable number.

21242334032 is a deficient number, since it is larger than the sum of its proper divisors (21027041284).

21242334032 is a wasteful number, since it uses less digits than its factorization.

21242334032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35882366 (or 35882360 counting only the distinct ones).

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

Adding to 21242334032 its reverse (23043324212), we get a palindrome (44285658244).

The spelling of 21242334032 in words is "twenty-one billion, two hundred forty-two million, three hundred thirty-four thousand, thirty-two".