20306104 has 32 divisors (see below), whose sum is σ = 46861920. Its totient is φ = 8032896.

The previous prime is 20306063. The next prime is 20306113. The reversal of 20306104 is 40160302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13219 + ... + 14674.

It is an arithmetic number, because the mean of its divisors is an integer number (1464435).

Almost surely, 2^20306104 is an apocalyptic number.

It is an amenable number.

20306104 is an abundant number, since it is smaller than the sum of its proper divisors (26555816).

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

20306104 is a wasteful number, since it uses less digits than its factorization.

20306104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27919 (or 27915 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20306104 is about 4506.2294659726. The cubic root of 20306104 is about 272.8195796096.

Adding to 20306104 its reverse (40160302), we get a palindrome (60466406).

The spelling of 20306104 in words is "twenty million, three hundred six thousand, one hundred four".