20213124 has 12 divisors (see below), whose sum is σ = 47163984. Its totient is φ = 6737704.

The previous prime is 20213107. The next prime is 20213183. The reversal of 20213124 is 42131202.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 842202 + ... + 842225.

It is an arithmetic number, because the mean of its divisors is an integer number (3930332).

Almost surely, 2^20213124 is an apocalyptic number.

It is an amenable number.

20213124 is an abundant number, since it is smaller than the sum of its proper divisors (26950860).

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

20213124 is a wasteful number, since it uses less digits than its factorization.

20213124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684434 (or 1684432 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20213124 is about 4495.9007996174. The cubic root of 20213124 is about 272.4025361966.

Adding to 20213124 its reverse (42131202), we get a palindrome (62344326).

The spelling of 20213124 in words is "twenty million, two hundred thirteen thousand, one hundred twenty-four".