20858448 has 40 divisors (see below), whose sum is σ = 58031008. Its totient is φ = 6417792.

The previous prime is 20858441. The next prime is 20858477. The reversal of 20858448 is 84485802.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858441) 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 7 ways as a sum of consecutive naturals, for example, 16090 + ... + 17337.

Almost surely, 2^20858448 is an apocalyptic number.

It is an amenable number.

20858448 is an abundant number, since it is smaller than the sum of its proper divisors (37172560).

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

20858448 is a wasteful number, since it uses less digits than its factorization.

20858448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33451 (or 33445 counting only the distinct ones).

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

The square root of 20858448 is about 4567.1049911295. The cubic root of 20858448 is about 275.2711287434.

The spelling of 20858448 in words is "twenty million, eight hundred fifty-eight thousand, four hundred forty-eight".