20494291 has 4 divisors (see below), whose sum is σ = 20505672. Its totient is φ = 20482912.

The previous prime is 20494283. The next prime is 20494307. The reversal of 20494291 is 19249402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20494291 - 2³ = 20494283 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20494211) 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, 2326 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (5126418).

Almost surely, 2^20494291 is an apocalyptic number.

20494291 is a deficient number, since it is larger than the sum of its proper divisors (11381).

20494291 is an equidigital number, since it uses as much as digits as its factorization.

20494291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11380.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20494291 is about 4527.0620715868. The cubic root of 20494291 is about 273.6597753858.

The spelling of 20494291 in words is "twenty million, four hundred ninety-four thousand, two hundred ninety-one".