20879124 has 96 divisors (see below), whose sum is σ = 59222016. Its totient is φ = 5596800.

The previous prime is 20879113. The next prime is 20879129. The reversal of 20879124 is 42197802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20879129) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 195079 + ... + 195185.

It is an arithmetic number, because the mean of its divisors is an integer number (616896).

Almost surely, 2^20879124 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 20879124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29611008).

20879124 is an abundant number, since it is smaller than the sum of its proper divisors (38342892).

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

20879124 is a wasteful number, since it uses less digits than its factorization.

20879124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 20879124 is about 4569.3680088170. The cubic root of 20879124 is about 275.3620531548.

It can be divided in two parts, 2087 and 9124, that added together give a palindrome (11211).

The spelling of 20879124 in words is "twenty million, eight hundred seventy-nine thousand, one hundred twenty-four".