21346963236 has 45 divisors (see below), whose sum is σ = 55812054529. Its totient is φ = 7114777776.

The previous prime is 21346963219. The next prime is 21346963241. The reversal of 21346963236 is 63236964312.

The square root of 21346963236 is 146106.

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

21346963236 is a `hidden beast` number, since 2 + 1 + 3 + 4 + 6 + 9 + 632 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19334902500 + 2012060736 = 139050^2 + 44856^2 .

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21346963191 and 21346963200.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2625850 + ... + 2633966.

Almost surely, 2^21346963236 is an apocalyptic number.

21346963236 is the 146106-th square number.

It is an amenable number.

21346963236 is an abundant number, since it is smaller than the sum of its proper divisors (34465091293).

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

21346963236 is an frugal number, since it uses more digits than its factorization.

21346963236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16250 (or 8122 counting only the distinct ones).

The product of its digits is 839808, while the sum is 45.

The spelling of 21346963236 in words is "twenty-one billion, three hundred forty-six million, nine hundred sixty-three thousand, two hundred thirty-six".