21293341 has 2 divisors, whose sum is σ = 21293342. Its totient is φ = 21293340.

The previous prime is 21293329. The next prime is 21293347. The reversal of 21293341 is 14339212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 1490841 = 4450^2 + 1221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21293341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21293347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10646670 + 10646671.

It is an arithmetic number, because the mean of its divisors is an integer number (10646671).

Almost surely, 2^21293341 is an apocalyptic number.

It is an amenable number.

21293341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21293341 is an equidigital number, since it uses as much as digits as its factorization.

21293341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 21293341 is about 4614.4708255660. The cubic root of 21293341 is about 277.1710942361.

The spelling of 21293341 in words is "twenty-one million, two hundred ninety-three thousand, three hundred forty-one".