20494349 has 4 divisors (see below), whose sum is σ = 20503680. Its totient is φ = 20485020.

The previous prime is 20494343. The next prime is 20494351. The reversal of 20494349 is 94349402.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20494349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20494343) 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 in 3 ways as a sum of consecutive naturals, for example, 644 + ... + 6434.

It is an arithmetic number, because the mean of its divisors is an integer number (5125920).

Almost surely, 2^20494349 is an apocalyptic number.

It is an amenable number.

20494349 is a deficient number, since it is larger than the sum of its proper divisors (9331).

20494349 is an equidigital number, since it uses as much as digits as its factorization.

20494349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 20494349 is about 4527.0684775029. The cubic root of 20494349 is about 273.6600335431.

The spelling of 20494349 in words is "twenty million, four hundred ninety-four thousand, three hundred forty-nine".