20263104 has 84 divisors (see below), whose sum is σ = 58749184. Its totient is φ = 6676992.

The previous prime is 20263097. The next prime is 20263109. The reversal of 20263104 is 40136202.

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 (20263109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73014 + ... + 73290.

Almost surely, 2^20263104 is an apocalyptic number.

20263104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20263104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29374592).

20263104 is an abundant number, since it is smaller than the sum of its proper divisors (38486080).

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

20263104 is a wasteful number, since it uses less digits than its factorization.

20263104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 409 counting only the distinct ones).

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

The square root of 20263104 is about 4501.4557645277. The cubic root of 20263104 is about 272.6268701936.

Adding to 20263104 its reverse (40136202), we get a palindrome (60399306).

The spelling of 20263104 in words is "twenty million, two hundred sixty-three thousand, one hundred four".