20345124 has 96 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 5806080.

The previous prime is 20345093. The next prime is 20345161. The reversal of 20345124 is 42154302.

It is a self number, because there is not a number n which added to its sum of digits gives 20345124.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 112314 + ... + 112494.

It is an arithmetic number, because the mean of its divisors is an integer number (573300).

Almost surely, 2^20345124 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 20345124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27518400).

20345124 is an abundant number, since it is smaller than the sum of its proper divisors (34691676).

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

20345124 is a wasteful number, since it uses less digits than its factorization.

20345124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20345124 is about 4510.5569500894. The cubic root of 20345124 is about 272.9942168937.

Adding to 20345124 its reverse (42154302), we get a palindrome (62499426).

The spelling of 20345124 in words is "twenty million, three hundred forty-five thousand, one hundred twenty-four".