21434110352 has 10 divisors (see below), whose sum is σ = 41528588838. Its totient is φ = 10717055168.

The previous prime is 21434110351. The next prime is 21434110393. The reversal of 21434110352 is 25301143412.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19225486336 + 2208624016 = 138656^2 + 46996^2 .

It is not an unprimeable number, because it can be changed into a prime (21434110351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669815933 + ... + 669815964.

Almost surely, 2^21434110352 is an apocalyptic number.

It is an amenable number.

21434110352 is a deficient number, since it is larger than the sum of its proper divisors (20094478486).

21434110352 is a wasteful number, since it uses less digits than its factorization.

21434110352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339631905 (or 1339631899 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21434110352 its reverse (25301143412), we get a palindrome (46735253764).

The spelling of 21434110352 in words is "twenty-one billion, four hundred thirty-four million, one hundred ten thousand, three hundred fifty-two".