20446320 has 40 divisors (see below), whose sum is σ = 63384336. Its totient is φ = 5452288.

The previous prime is 20446301. The next prime is 20446343. The reversal of 20446320 is 2364402.

It is a tau number, because it is divible by the number of its divisors (40).

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, 42357 + ... + 42836.

Almost surely, 2^20446320 is an apocalyptic number.

20446320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20446320 is an abundant number, since it is smaller than the sum of its proper divisors (42938016).

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

20446320 is a wasteful number, since it uses less digits than its factorization.

20446320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85209 (or 85203 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 20446320 is about 4521.7607190120. The cubic root of 20446320 is about 273.4460900376.

The spelling of 20446320 in words is "twenty million, four hundred forty-six thousand, three hundred twenty".