21361096 has 16 divisors (see below), whose sum is σ = 40450140. Its totient is φ = 10574400.

The previous prime is 21361091. The next prime is 21361097. The reversal of 21361096 is 69016312.

It can be written as a sum of positive squares in 2 ways, for example, as 16892100 + 4468996 = 4110^2 + 2114^2 .

It is not an unprimeable number, because it can be changed into a prime (21361091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12411 + ... + 14026.

Almost surely, 2^21361096 is an apocalyptic number.

It is an amenable number.

21361096 is a deficient number, since it is larger than the sum of its proper divisors (19089044).

21361096 is a wasteful number, since it uses less digits than its factorization.

21361096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26544 (or 26540 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 21361096 is about 4621.8065731919. The cubic root of 21361096 is about 277.4647673257.

The spelling of 21361096 in words is "twenty-one million, three hundred sixty-one thousand, ninety-six".