21485083 has 2 divisors, whose sum is σ = 21485084. Its totient is φ = 21485082.

The previous prime is 21485071. The next prime is 21485089. The reversal of 21485083 is 38058412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21485083 - 2⁹ = 21484571 is a prime.

It is equal to p_1358752 and since 21485083 and 1358752 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (21485089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10742541 + 10742542.

It is an arithmetic number, because the mean of its divisors is an integer number (10742542).

Almost surely, 2^21485083 is an apocalyptic number.

21485083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21485083 is an equidigital number, since it uses as much as digits as its factorization.

21485083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 21485083 is about 4635.2004271660. The cubic root of 21485083 is about 278.0005650145. Note that the first 3 decimals are identical.

The spelling of 21485083 in words is "twenty-one million, four hundred eighty-five thousand, eighty-three".