20304055 has 8 divisors (see below), whose sum is σ = 25424352. Its totient is φ = 15536928.

The previous prime is 20304049. The next prime is 20304077. The reversal of 20304055 is 55040302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20304055 - 2⁵ = 20304023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88164 + ... + 88393.

It is an arithmetic number, because the mean of its divisors is an integer number (3178044).

Almost surely, 2^20304055 is an apocalyptic number.

20304055 is a deficient number, since it is larger than the sum of its proper divisors (5120297).

20304055 is a wasteful number, since it uses less digits than its factorization.

20304055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176585.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20304055 is about 4506.0021082996. The cubic root of 20304055 is about 272.8104029581.

Subtracting from 20304055 its sum of digits (19), we obtain a square (20304036 = 4506²).

Adding to 20304055 its reverse (55040302), we get a palindrome (75344357).

The spelling of 20304055 in words is "twenty million, three hundred four thousand, fifty-five".