20599349 has 2 divisors, whose sum is σ = 20599350. Its totient is φ = 20599348.

The previous prime is 20599339. The next prime is 20599361. The reversal of 20599349 is 94399502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 33124 = 4535^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 20599349 - 2⁸ = 20599093 is a prime.

It is a super-3 number, since 3×20599349³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20599339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10299674 + 10299675.

It is an arithmetic number, because the mean of its divisors is an integer number (10299675).

Almost surely, 2^20599349 is an apocalyptic number.

It is an amenable number.

20599349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20599349 is an equidigital number, since it uses as much as digits as its factorization.

20599349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 20599349 is about 4538.6505703788. The cubic root of 20599349 is about 274.1265909443.

The spelling of 20599349 in words is "twenty million, five hundred ninety-nine thousand, three hundred forty-nine".