20873124 has 18 divisors (see below), whose sum is σ = 52762710. Its totient is φ = 6957696.

The previous prime is 20873107. The next prime is 20873129. The reversal of 20873124 is 42137802.

It can be written as a sum of positive squares in only one way, i.e., 20793600 + 79524 = 4560^2 + 282^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (20873129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289869 + ... + 289940.

Almost surely, 2^20873124 is an apocalyptic number.

It is an amenable number.

20873124 is an abundant number, since it is smaller than the sum of its proper divisors (31889586).

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

20873124 is a wasteful number, since it uses less digits than its factorization.

20873124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579819 (or 579814 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20873124 is about 4568.7114157057. The cubic root of 20873124 is about 275.3356738456.

The spelling of 20873124 in words is "twenty million, eight hundred seventy-three thousand, one hundred twenty-four".