21675083 has 2 divisors, whose sum is σ = 21675084. Its totient is φ = 21675082.

The previous prime is 21675077. The next prime is 21675091. The reversal of 21675083 is 38057612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21675083 - 2¹⁶ = 21609547 is a prime.

It is not a weakly prime, because it can be changed into another prime (21675013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10837541 + 10837542.

It is an arithmetic number, because the mean of its divisors is an integer number (10837542).

Almost surely, 2^21675083 is an apocalyptic number.

21675083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21675083 is an equidigital number, since it uses as much as digits as its factorization.

21675083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 21675083 is about 4655.6506527015. The cubic root of 21675083 is about 278.8176461135.

It can be divided in two parts, 2 and 1675083, that multiplied together give a triangular number (3350166 = T₂₅₈₈).

The spelling of 21675083 in words is "twenty-one million, six hundred seventy-five thousand, eighty-three".