20258424 has 96 divisors (see below), whose sum is σ = 60343920. Its totient is φ = 6345216.

The previous prime is 20258401. The next prime is 20258437. The reversal of 20258424 is 42485202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 32742 + ... + 33354.

Almost surely, 2^20258424 is an apocalyptic number.

20258424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20258424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30171960).

20258424 is an abundant number, since it is smaller than the sum of its proper divisors (40085496).

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

20258424 is a wasteful number, since it uses less digits than its factorization.

20258424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 20258424 is about 4500.9359026762. The cubic root of 20258424 is about 272.6058797933.

The spelling of 20258424 in words is "twenty million, two hundred fifty-eight thousand, four hundred twenty-four".