20123802 has 48 divisors (see below), whose sum is σ = 46230912. Its totient is φ = 6557760.

The previous prime is 20123783. The next prime is 20123809. The reversal of 20123802 is 20832102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20123809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22402 + ... + 23282.

It is an arithmetic number, because the mean of its divisors is an integer number (963144).

Almost surely, 2^20123802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23115456).

20123802 is an abundant number, since it is smaller than the sum of its proper divisors (26107110).

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

20123802 is an equidigital number, since it uses as much as digits as its factorization.

20123802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20123802 is about 4485.9560853847. The cubic root of 20123802 is about 272.0006938419. Note that the first 3 decimals are identical.

Adding to 20123802 its reverse (20832102), we get a palindrome (40955904).

The spelling of 20123802 in words is "twenty million, one hundred twenty-three thousand, eight hundred two".