20448858 has 32 divisors (see below), whose sum is σ = 43497216. Its totient is φ = 6386688.

The previous prime is 20448853. The next prime is 20448859. The reversal of 20448858 is 85884402.

It is not an unprimeable number, because it can be changed into a prime (20448853) 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, 43935 + ... + 44397.

It is an arithmetic number, because the mean of its divisors is an integer number (1359288).

Almost surely, 2^20448858 is an apocalyptic number.

20448858 is an abundant number, since it is smaller than the sum of its proper divisors (23048358).

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

20448858 is a wasteful number, since it uses less digits than its factorization.

20448858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918.

The product of its (nonzero) digits is 81920, while the sum is 39.

The square root of 20448858 is about 4522.0413531944. The cubic root of 20448858 is about 273.4574038496.

It can be divided in two parts, 20 and 448858, that added together give a triangular number (448878 = T₉₄₇).

The spelling of 20448858 in words is "twenty million, four hundred forty-eight thousand, eight hundred fifty-eight".