21362086 has 4 divisors (see below), whose sum is σ = 32043132. Its totient is φ = 10681042.

The previous prime is 21362057. The next prime is 21362113. The reversal of 21362086 is 68026312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5340520 + ... + 5340523.

It is an arithmetic number, because the mean of its divisors is an integer number (8010783).

Almost surely, 2^21362086 is an apocalyptic number.

21362086 is a deficient number, since it is larger than the sum of its proper divisors (10681046).

21362086 is a wasteful number, since it uses less digits than its factorization.

21362086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10681045.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 21362086 is about 4621.9136729281. The cubic root of 21362086 is about 277.4690537143.

Adding to 21362086 its reverse (68026312), we get a palindrome (89388398).

The spelling of 21362086 in words is "twenty-one million, three hundred sixty-two thousand, eighty-six".