20520258 has 32 divisors (see below), whose sum is σ = 47407680. Its totient is φ = 5852160.

The previous prime is 20520257. The next prime is 20520263. The reversal of 20520258 is 85202502.

It is not an unprimeable number, because it can be changed into a prime (20520257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8023 + ... + 10266.

It is an arithmetic number, because the mean of its divisors is an integer number (1481490).

Almost surely, 2^20520258 is an apocalyptic number.

20520258 is an abundant number, since it is smaller than the sum of its proper divisors (26887422).

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

20520258 is a wasteful number, since it uses less digits than its factorization.

20520258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18322.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 20520258 is about 4529.9291385186. The cubic root of 20520258 is about 273.7753055150.

The spelling of 20520258 in words is "twenty million, five hundred twenty thousand, two hundred fifty-eight".