20863104 has 32 divisors (see below), whose sum is σ = 55418640. Its totient is φ = 6954240.

The previous prime is 20863103. The next prime is 20863111. The reversal of 20863104 is 40136802.

It is a happy number.

20863104 is nontrivially palindromic in base 7.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20863103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26782 + ... + 27549.

Almost surely, 2^20863104 is an apocalyptic number.

20863104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20863104 is an abundant number, since it is smaller than the sum of its proper divisors (34555536).

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

20863104 is an equidigital number, since it uses as much as digits as its factorization.

20863104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54348 (or 54336 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20863104 is about 4567.6146947833. The cubic root of 20863104 is about 275.2916091266.

Adding to 20863104 its reverse (40136802), we get a palindrome (60999906).

The spelling of 20863104 in words is "twenty million, eight hundred sixty-three thousand, one hundred four".