20208349 has 4 divisors (see below), whose sum is σ = 23095264. Its totient is φ = 17321436.

The previous prime is 20208347. The next prime is 20208379. The reversal of 20208349 is 94380202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20208349 - 2¹ = 20208347 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20208347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443447 + ... + 1443460.

It is an arithmetic number, because the mean of its divisors is an integer number (5773816).

Almost surely, 2^20208349 is an apocalyptic number.

It is an amenable number.

20208349 is a deficient number, since it is larger than the sum of its proper divisors (2886915).

20208349 is an equidigital number, since it uses as much as digits as its factorization.

20208349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886914.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20208349 is about 4495.3697289544. The cubic root of 20208349 is about 272.3810843822.

The spelling of 20208349 in words is "twenty million, two hundred eight thousand, three hundred forty-nine".