20955104 has 48 divisors (see below), whose sum is σ = 42921648. Its totient is φ = 10063872.

The previous prime is 20955097. The next prime is 20955107. The reversal of 20955104 is 40155902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20955107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133394 + ... + 133550.

It is an arithmetic number, because the mean of its divisors is an integer number (894201).

Almost surely, 2^20955104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20955104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21460824).

20955104 is an abundant number, since it is smaller than the sum of its proper divisors (21966544).

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

20955104 is a wasteful number, since it uses less digits than its factorization.

20955104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 20955104 is about 4577.6745187923. The cubic root of 20955104 is about 275.6956667888.

The spelling of 20955104 in words is "twenty million, nine hundred fifty-five thousand, one hundred four".