20545104 has 20 divisors (see below), whose sum is σ = 53074976. Its totient is φ = 6848352.

The previous prime is 20545097. The next prime is 20545127. The reversal of 20545104 is 40154502.

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 3 ways as a sum of consecutive naturals, for example, 213964 + ... + 214059.

Almost surely, 2^20545104 is an apocalyptic number.

20545104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20545104 is an abundant number, since it is smaller than the sum of its proper divisors (32529872).

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

20545104 is a wasteful number, since it uses less digits than its factorization.

20545104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428034 (or 428028 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20545104 is about 4532.6707358907. The cubic root of 20545104 is about 273.8857569804.

Adding to 20545104 its reverse (40154502), we get a palindrome (60699606).

The spelling of 20545104 in words is "twenty million, five hundred forty-five thousand, one hundred four".