20590745 has 16 divisors (see below), whose sum is σ = 28629120. Its totient is φ = 13924224.

The previous prime is 20590709. The next prime is 20590751. The reversal of 20590745 is 54709502.

It is a cyclic number.

It is not a de Polignac number, because 20590745 - 2¹⁰ = 20589721 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1475 + ... + 6584.

It is an arithmetic number, because the mean of its divisors is an integer number (1789320).

Almost surely, 2^20590745 is an apocalyptic number.

It is an amenable number.

20590745 is a deficient number, since it is larger than the sum of its proper divisors (8038375).

20590745 is an equidigital number, since it uses as much as digits as its factorization.

20590745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 20590745 is about 4537.7026125563. The cubic root of 20590745 is about 274.0884196143.

The spelling of 20590745 in words is "twenty million, five hundred ninety thousand, seven hundred forty-five".