21032540293 has 2 divisors, whose sum is σ = 21032540294. Its totient is φ = 21032540292.

The previous prime is 21032540227. The next prime is 21032540297. The reversal of 21032540293 is 39204523012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18263360164 + 2769180129 = 135142^2 + 52623^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032540293 - 2¹⁷ = 21032409221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032540297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516270146 + 10516270147.

It is an arithmetic number, because the mean of its divisors is an integer number (10516270147).

Almost surely, 2^21032540293 is an apocalyptic number.

It is an amenable number.

21032540293 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032540293 is an equidigital number, since it uses as much as digits as its factorization.

21032540293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 21032540293 in words is "twenty-one billion, thirty-two million, five hundred forty thousand, two hundred ninety-three".