21326513296 has 45 divisors (see below), whose sum is σ = 45431670963. Its totient is φ = 9690948960.

The previous prime is 21326513249. The next prime is 21326513303. The reversal of 21326513296 is 69231562312.

The square root of 21326513296 is 146036.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6423925 + ... + 6427243.

Almost surely, 2^21326513296 is an apocalyptic number.

21326513296 is the 146036-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21326513296

21326513296 is an abundant number, since it is smaller than the sum of its proper divisors (24105157667).

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

21326513296 is an frugal number, since it uses more digits than its factorization.

21326513296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668 (or 3332 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The spelling of 21326513296 in words is "twenty-one billion, three hundred twenty-six million, five hundred thirteen thousand, two hundred ninety-six".