21032293 has 2 divisors, whose sum is σ = 21032294. Its totient is φ = 21032292.

The previous prime is 21032287. The next prime is 21032299. The reversal of 21032293 is 39223012.

It is a balanced prime because it is at equal distance from previous prime (21032287) and next prime (21032299).

It can be written as a sum of positive squares in only one way, i.e., 13972644 + 7059649 = 3738^2 + 2657^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032293 - 2⁹ = 21031781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516146 + 10516147.

It is an arithmetic number, because the mean of its divisors is an integer number (10516147).

Almost surely, 2^21032293 is an apocalyptic number.

It is an amenable number.

21032293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032293 is an equidigital number, since it uses as much as digits as its factorization.

21032293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 21032293 is about 4586.0977966022. The cubic root of 21032293 is about 276.0337641603.

The spelling of 21032293 in words is "twenty-one million, thirty-two thousand, two hundred ninety-three".