20430848 has 60 divisors (see below), whose sum is σ = 43252440. Its totient is φ = 9633792.

The previous prime is 20430841. The next prime is 20430857. The reversal of 20430848 is 84803402.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 20430848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430841) 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, 475115 + ... + 475157.

It is an arithmetic number, because the mean of its divisors is an integer number (720874).

Almost surely, 2^20430848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21626220).

20430848 is an abundant number, since it is smaller than the sum of its proper divisors (22821592).

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

20430848 is an frugal number, since it uses more digits than its factorization.

20430848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 20430848 is about 4520.0495572505. The cubic root of 20430848 is about 273.3770992117.

The spelling of 20430848 in words is "twenty million, four hundred thirty thousand, eight hundred forty-eight".