20258247 has 4 divisors (see below), whose sum is σ = 27011000. Its totient is φ = 13505496.

The previous prime is 20258213. The next prime is 20258261. The reversal of 20258247 is 74285202.

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

It is not a de Polignac number, because 20258247 - 2¹⁵ = 20225479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20258267) 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, 3376372 + ... + 3376377.

It is an arithmetic number, because the mean of its divisors is an integer number (6752750).

Almost surely, 2^20258247 is an apocalyptic number.

20258247 is a deficient number, since it is larger than the sum of its proper divisors (6752753).

20258247 is an equidigital number, since it uses as much as digits as its factorization.

20258247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752752.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20258247 is about 4500.9162400560. The cubic root of 20258247 is about 272.6050858622.

The spelling of 20258247 in words is "twenty million, two hundred fifty-eight thousand, two hundred forty-seven".