21414193 has 2 divisors, whose sum is σ = 21414194. Its totient is φ = 21414192.

The previous prime is 21414119. The next prime is 21414221. The reversal of 21414193 is 39141412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12723489 + 8690704 = 3567^2 + 2948^2 .

It is a cyclic number.

It is not a de Polignac number, because 21414193 - 2¹³ = 21406001 is a prime.

It is not a weakly prime, because it can be changed into another prime (21414103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707096 + 10707097.

It is an arithmetic number, because the mean of its divisors is an integer number (10707097).

Almost surely, 2^21414193 is an apocalyptic number.

It is an amenable number.

21414193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414193 is an equidigital number, since it uses as much as digits as its factorization.

21414193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 21414193 is about 4627.5471904671. The cubic root of 21414193 is about 277.6944739654.

The spelling of 21414193 in words is "twenty-one million, four hundred fourteen thousand, one hundred ninety-three".