20478268 has 24 divisors (see below), whose sum is σ = 38090304. Its totient is φ = 9600000.

The previous prime is 20478253. The next prime is 20478281. The reversal of 20478268 is 86287402.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26893 + ... + 27643.

It is an arithmetic number, because the mean of its divisors is an integer number (1587096).

Almost surely, 2^20478268 is an apocalyptic number.

It is an amenable number.

20478268 is a deficient number, since it is larger than the sum of its proper divisors (17612036).

20478268 is a wasteful number, since it uses less digits than its factorization.

20478268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173 (or 1171 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 20478268 is about 4525.2920347752. The cubic root of 20478268 is about 273.5884385468.

The spelling of 20478268 in words is "twenty million, four hundred seventy-eight thousand, two hundred sixty-eight".