20001124 has 48 divisors (see below), whose sum is σ = 41771520. Its totient is φ = 8259840.

The previous prime is 20001083. The next prime is 20001139. The reversal of 20001124 is 42110002.

It is a super-2 number, since 2×20001124² = 800089922526752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20001124.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41517 + ... + 41995.

It is an arithmetic number, because the mean of its divisors is an integer number (870240).

Almost surely, 2^20001124 is an apocalyptic number.

It is an amenable number.

20001124 is an abundant number, since it is smaller than the sum of its proper divisors (21770396).

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

20001124 is a wasteful number, since it uses less digits than its factorization.

20001124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20001124 is about 4472.2616202543. The cubic root of 20001124 is about 271.4468465732.

Adding to 20001124 its reverse (42110002), we get a palindrome (62111126).

The spelling of 20001124 in words is "twenty million, one thousand, one hundred twenty-four".