20458249 has 16 divisors (see below), whose sum is σ = 23959936. Its totient is φ = 17107200.

The previous prime is 20458223. The next prime is 20458261. The reversal of 20458249 is 94285402.

It is a cyclic number.

It is not a de Polignac number, because 20458249 - 2¹³ = 20450057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20458279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84769 + ... + 85009.

It is an arithmetic number, because the mean of its divisors is an integer number (1497496).

Almost surely, 2^20458249 is an apocalyptic number.

It is an amenable number.

20458249 is a deficient number, since it is larger than the sum of its proper divisors (3501687).

20458249 is a wasteful number, since it uses less digits than its factorization.

20458249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 20458249 is about 4523.0795924901. The cubic root of 20458249 is about 273.4992585987.

The spelling of 20458249 in words is "twenty million, four hundred fifty-eight thousand, two hundred forty-nine".