20281124 has 12 divisors (see below), whose sum is σ = 37035264. Its totient is φ = 9699624.

The previous prime is 20281123. The next prime is 20281141. The reversal of 20281124 is 42118202.

It is a happy number.

It is a super-2 number, since 2×20281124² = 822647981406752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20281096 and 20281105.

It is not an unprimeable number, because it can be changed into a prime (20281123) 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 3 ways as a sum of consecutive naturals, for example, 110132 + ... + 110315.

It is an arithmetic number, because the mean of its divisors is an integer number (3086272).

Almost surely, 2^20281124 is an apocalyptic number.

It is an amenable number.

20281124 is a deficient number, since it is larger than the sum of its proper divisors (16754140).

20281124 is a wasteful number, since it uses less digits than its factorization.

20281124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220474 (or 220472 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 20281124 is about 4503.4568944312. The cubic root of 20281124 is about 272.7076620377.

Adding to 20281124 its reverse (42118202), we get a palindrome (62399326).

The spelling of 20281124 in words is "twenty million, two hundred eighty-one thousand, one hundred twenty-four".