20604493 has 32 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 14515200.

The previous prime is 20604457. The next prime is 20604499. The reversal of 20604493 is 39440602.

It is not a de Polignac number, because 20604493 - 2¹⁷ = 20473421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20604499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29043 + ... + 29743.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^20604493 is an apocalyptic number.

It is an amenable number.

20604493 is a deficient number, since it is larger than the sum of its proper divisors (7700147).

20604493 is a wasteful number, since it uses less digits than its factorization.

20604493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20604493 is about 4539.2172232666. The cubic root of 20604493 is about 274.1494070347.

The spelling of 20604493 in words is "twenty million, six hundred four thousand, four hundred ninety-three".