20493353 has 2 divisors, whose sum is σ = 20493354. Its totient is φ = 20493352.

The previous prime is 20493349. The next prime is 20493371. The reversal of 20493353 is 35339402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16216729 + 4276624 = 4027^2 + 2068^2 .

It is a cyclic number.

It is not a de Polignac number, because 20493353 - 2² = 20493349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20493323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10246676 + 10246677.

It is an arithmetic number, because the mean of its divisors is an integer number (10246677).

Almost surely, 2^20493353 is an apocalyptic number.

It is an amenable number.

20493353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20493353 is an equidigital number, since it uses as much as digits as its factorization.

20493353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 20493353 is about 4526.9584712034. The cubic root of 20493353 is about 273.6556002916.

The spelling of 20493353 in words is "twenty million, four hundred ninety-three thousand, three hundred fifty-three".