20123885 has 8 divisors (see below), whose sum is σ = 24489216. Its totient is φ = 15872080.

The previous prime is 20123881. The next prime is 20123891. The reversal of 20123885 is 58832102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20123885 - 2² = 20123881 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27989 + ... + 28698.

It is an arithmetic number, because the mean of its divisors is an integer number (3061152).

Almost surely, 2^20123885 is an apocalyptic number.

It is an amenable number.

20123885 is a deficient number, since it is larger than the sum of its proper divisors (4365331).

20123885 is an equidigital number, since it uses as much as digits as its factorization.

20123885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56763.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 20123885 is about 4485.9653364688. The cubic root of 20123885 is about 272.0010677943.

Adding to 20123885 its reverse (58832102), we get a palindrome (78955987).

The spelling of 20123885 in words is "twenty million, one hundred twenty-three thousand, eight hundred eighty-five".