20945448 has 96 divisors (see below), whose sum is σ = 60933600. Its totient is φ = 6480000.

The previous prime is 20945399. The next prime is 20945461. The reversal of 20945448 is 84454902.

20945448 is a `hidden beast` number, since 20 + 94 + 544 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 83323 + ... + 83573.

It is an arithmetic number, because the mean of its divisors is an integer number (634725).

Almost surely, 2^20945448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20945448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30466800).

20945448 is an abundant number, since it is smaller than the sum of its proper divisors (39988152).

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

20945448 is a wasteful number, since it uses less digits than its factorization.

20945448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 20945448 is about 4576.6197132818. The cubic root of 20945448 is about 275.6533139192.

The spelling of 20945448 in words is "twenty million, nine hundred forty-five thousand, four hundred forty-eight".