20123884 has 24 divisors (see below), whose sum is σ = 38532816. Its totient is φ = 9120000.

The previous prime is 20123881. The next prime is 20123891. The reversal of 20123884 is 48832102.

It is not an unprimeable number, because it can be changed into a prime (20123881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26064 + ... + 26824.

It is an arithmetic number, because the mean of its divisors is an integer number (1605534).

Almost surely, 2^20123884 is an apocalyptic number.

It is an amenable number.

20123884 is a deficient number, since it is larger than the sum of its proper divisors (18408932).

20123884 is a wasteful number, since it uses less digits than its factorization.

20123884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377 (or 1375 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20123884 is about 4485.9652250101. The cubic root of 20123884 is about 272.0010632888.

Adding to 20123884 its reverse (48832102), we get a palindrome (68955986).

It can be divided in two parts, 20 and 123884, that added together give a square (123904 = 352²).

The spelling of 20123884 in words is "twenty million, one hundred twenty-three thousand, eight hundred eighty-four".