20258497 has 4 divisors (see below), whose sum is σ = 23152576. Its totient is φ = 17364420.

The previous prime is 20258477. The next prime is 20258507. The reversal of 20258497 is 79485202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20258497 - 2⁷ = 20258369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20258437) 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, 1447029 + ... + 1447042.

It is an arithmetic number, because the mean of its divisors is an integer number (5788144).

Almost surely, 2^20258497 is an apocalyptic number.

It is an amenable number.

20258497 is a deficient number, since it is larger than the sum of its proper divisors (2894079).

20258497 is an equidigital number, since it uses as much as digits as its factorization.

20258497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894078.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 20258497 is about 4500.9440120935. The cubic root of 20258497 is about 272.6062072325.

The spelling of 20258497 in words is "twenty million, two hundred fifty-eight thousand, four hundred ninety-seven".