21134156416 has 32 divisors (see below), whose sum is σ = 42679977300. Its totient is φ = 10422319104.

The previous prime is 21134156383. The next prime is 21134156423. The reversal of 21134156416 is 61465143112.

It can be written as a sum of positive squares in 2 ways, for example, as 19741374016 + 1392782400 = 140504^2 + 37320^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121551 + ... + 1140238.

Almost surely, 2^21134156416 is an apocalyptic number.

It is an amenable number.

21134156416 is an abundant number, since it is smaller than the sum of its proper divisors (21545820884).

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

21134156416 is an equidigital number, since it uses as much as digits as its factorization.

21134156416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261876 (or 2261864 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

Adding to 21134156416 its reverse (61465143112), we get a palindrome (82599299528).

The spelling of 21134156416 in words is "twenty-one billion, one hundred thirty-four million, one hundred fifty-six thousand, four hundred sixteen".