21498067 has 2 divisors, whose sum is σ = 21498068. Its totient is φ = 21498066.

The previous prime is 21498041. The next prime is 21498083. The reversal of 21498067 is 76089412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21498067 - 2¹⁹ = 20973779 is a prime.

It is not a weakly prime, because it can be changed into another prime (21492067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10749033 + 10749034.

It is an arithmetic number, because the mean of its divisors is an integer number (10749034).

Almost surely, 2^21498067 is an apocalyptic number.

21498067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21498067 is an equidigital number, since it uses as much as digits as its factorization.

21498067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 21498067 is about 4636.6008023120. The cubic root of 21498067 is about 278.0565547518.

The spelling of 21498067 in words is "twenty-one million, four hundred ninety-eight thousand, sixty-seven".