20342320 has 20 divisors (see below), whose sum is σ = 47296080. Its totient is φ = 8136896.

The previous prime is 20342317. The next prime is 20342347. The reversal of 20342320 is 2324302.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20342294 and 20342303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127060 + ... + 127219.

It is an arithmetic number, because the mean of its divisors is an integer number (2364804).

Almost surely, 2^20342320 is an apocalyptic number.

20342320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20342320 is an abundant number, since it is smaller than the sum of its proper divisors (26953760).

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

20342320 is a wasteful number, since it uses less digits than its factorization.

20342320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254292 (or 254286 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20342320 is about 4510.2461130187. The cubic root of 20342320 is about 272.9816748066.

Adding to 20342320 its reverse (2324302), we get a palindrome (22666622).

The spelling of 20342320 in words is "twenty million, three hundred forty-two thousand, three hundred twenty".