20406448 has 20 divisors (see below), whose sum is σ = 40209480. Its totient is φ = 10029824.

The previous prime is 20406439. The next prime is 20406461. The reversal of 20406448 is 84460402.

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, 9865 + ... + 11752.

It is an arithmetic number, because the mean of its divisors is an integer number (2010474).

Almost surely, 2^20406448 is an apocalyptic number.

It is an amenable number.

20406448 is a deficient number, since it is larger than the sum of its proper divisors (19803032).

20406448 is a wasteful number, since it uses less digits than its factorization.

20406448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21684 (or 21678 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 20406448 is about 4517.3496654565. The cubic root of 20406448 is about 273.2682269415.

The spelling of 20406448 in words is "twenty million, four hundred six thousand, four hundred forty-eight".