21150683 has 2 divisors, whose sum is σ = 21150684. Its totient is φ = 21150682.

The previous prime is 21150673. The next prime is 21150709. The reversal of 21150683 is 38605112.

It is an a-pointer prime, because the next prime (21150709) can be obtained adding 21150683 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21150683 - 2¹⁰ = 21149659 is a prime.

It is not a weakly prime, because it can be changed into another prime (21150653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10575341 + 10575342.

It is an arithmetic number, because the mean of its divisors is an integer number (10575342).

Almost surely, 2^21150683 is an apocalyptic number.

21150683 is a deficient number, since it is larger than the sum of its proper divisors (1).

21150683 is an equidigital number, since it uses as much as digits as its factorization.

21150683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 21150683 is about 4598.9871711063. The cubic root of 21150683 is about 276.5507233412.

Adding to 21150683 its reverse (38605112), we get a palindrome (59755795).

The spelling of 21150683 in words is "twenty-one million, one hundred fifty thousand, six hundred eighty-three".