20494207 has 2 divisors, whose sum is σ = 20494208. Its totient is φ = 20494206.

The previous prime is 20494183. The next prime is 20494211. The reversal of 20494207 is 70249402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20494207 - 2¹⁵ = 20461439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20494237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10247103 + 10247104.

It is an arithmetic number, because the mean of its divisors is an integer number (10247104).

Almost surely, 2^20494207 is an apocalyptic number.

20494207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20494207 is an equidigital number, since it uses as much as digits as its factorization.

20494207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20494207 is about 4527.0527940372. The cubic root of 20494207 is about 273.6594015019.

The spelling of 20494207 in words is "twenty million, four hundred ninety-four thousand, two hundred seven".