202321921493 has 2 divisors, whose sum is σ = 202321921494. Its totient is φ = 202321921492.

The previous prime is 202321921481. The next prime is 202321921511. The reversal of 202321921493 is 394129123202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148011017284 + 54310904209 = 384722^2 + 233047^2 .

It is a cyclic number.

It is not a de Polignac number, because 202321921493 - 2⁶ = 202321921429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202321921793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101160960746 + 101160960747.

It is an arithmetic number, because the mean of its divisors is an integer number (101160960747).

Almost surely, 2^202321921493 is an apocalyptic number.

It is an amenable number.

202321921493 is a deficient number, since it is larger than the sum of its proper divisors (1).

202321921493 is an equidigital number, since it uses as much as digits as its factorization.

202321921493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 202321921493 in words is "two hundred two billion, three hundred twenty-one million, nine hundred twenty-one thousand, four hundred ninety-three".