21596065936 has 15 divisors (see below), whose sum is σ = 41843516691. Its totient is φ = 10797739056.

The previous prime is 21596065919. The next prime is 21596065943. The reversal of 21596065936 is 63956069512.

The square root of 21596065936 is 146956.

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 2 ways as a sum of consecutive naturals, for example, 569455 + ... + 606193.

Almost surely, 2^21596065936 is an apocalyptic number.

21596065936 is the 146956-th square number.

It is an amenable number.

21596065936 is a deficient number, since it is larger than the sum of its proper divisors (20247450755).

21596065936 is an frugal number, since it uses more digits than its factorization.

21596065936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73486 (or 36741 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 52.

The spelling of 21596065936 in words is "twenty-one billion, five hundred ninety-six million, sixty-five thousand, nine hundred thirty-six".