20495304 has 24 divisors (see below), whose sum is σ = 55508310. Its totient is φ = 6831744.

The previous prime is 20495303. The next prime is 20495317. The reversal of 20495304 is 40359402.

It can be written as a sum of positive squares in only one way, i.e., 18507204 + 1988100 = 4302^2 + 1410^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (20495303) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 142257 + ... + 142400.

Almost surely, 2^20495304 is an apocalyptic number.

20495304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20495304 is an abundant number, since it is smaller than the sum of its proper divisors (35013006).

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

20495304 is a wasteful number, since it uses less digits than its factorization.

20495304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284669 (or 284662 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20495304 is about 4527.1739529203. The cubic root of 20495304 is about 273.6642841664.

The spelling of 20495304 in words is "twenty million, four hundred ninety-five thousand, three hundred four".