20623104 has 54 divisors (see below), whose sum is σ = 59468136. Its totient is φ = 6873600.

The previous prime is 20623103. The next prime is 20623117. The reversal of 20623104 is 40132602.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623103) 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 5 ways as a sum of consecutive naturals, for example, 2172 + ... + 6779.

Almost surely, 2^20623104 is an apocalyptic number.

20623104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20623104 is an abundant number, since it is smaller than the sum of its proper divisors (38845032).

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

20623104 is an equidigital number, since it uses as much as digits as its factorization.

20623104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973 (or 8956 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20623104 is about 4541.2667836189. The cubic root of 20623104 is about 274.2319239757.

Adding to 20623104 its reverse (40132602), we get a palindrome (60755706).

The spelling of 20623104 in words is "twenty million, six hundred twenty-three thousand, one hundred four".