20458045 has 4 divisors (see below), whose sum is σ = 24549660. Its totient is φ = 16366432.

The previous prime is 20458043. The next prime is 20458069. The reversal of 20458045 is 54085402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6365529 + 14092516 = 2523^2 + 3754^2 .

It is a cyclic number.

It is not a de Polignac number, because 20458045 - 2¹ = 20458043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20458043) 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, 2045800 + ... + 2045809.

It is an arithmetic number, because the mean of its divisors is an integer number (6137415).

Almost surely, 2^20458045 is an apocalyptic number.

It is an amenable number.

20458045 is a deficient number, since it is larger than the sum of its proper divisors (4091615).

20458045 is an equidigital number, since it uses as much as digits as its factorization.

20458045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091614.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 20458045 is about 4523.0570414267. The cubic root of 20458045 is about 273.4983495272.

The spelling of 20458045 in words is "twenty million, four hundred fifty-eight thousand, forty-five".