20493258 has 16 divisors (see below), whose sum is σ = 41083200. Its totient is φ = 6814976.

The previous prime is 20493257. The next prime is 20493271. The reversal of 20493258 is 85239402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20493257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110 + ... + 6497.

It is an arithmetic number, because the mean of its divisors is an integer number (2567700).

Almost surely, 2^20493258 is an apocalyptic number.

20493258 is an abundant number, since it is smaller than the sum of its proper divisors (20589942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20493258 is a wasteful number, since it uses less digits than its factorization.

20493258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8061.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 20493258 is about 4526.9479784950. The cubic root of 20493258 is about 273.6551774338.

The spelling of 20493258 in words is "twenty million, four hundred ninety-three thousand, two hundred fifty-eight".