21335276356 has 27 divisors (see below), whose sum is σ = 37627825599. Its totient is φ = 10585110888.

The previous prime is 21335276341. The next prime is 21335276359. The reversal of 21335276356 is 65367253312.

The square root of 21335276356 is 146066.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21335276359) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 58134085 + ... + 58134451.

Almost surely, 2^21335276356 is an apocalyptic number.

21335276356 is the 146066-th square number.

It is an amenable number.

21335276356 is a deficient number, since it is larger than the sum of its proper divisors (16292549243).

21335276356 is an frugal number, since it uses more digits than its factorization.

21335276356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136 (or 568 counting only the distinct ones).

The product of its digits is 680400, while the sum is 43.

The spelling of 21335276356 in words is "twenty-one billion, three hundred thirty-five million, two hundred seventy-six thousand, three hundred fifty-six".