20448429 has 8 divisors (see below), whose sum is σ = 27461280. Its totient is φ = 13533936.

The previous prime is 20448413. The next prime is 20448443. The reversal of 20448429 is 92484402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20448429 - 2⁴ = 20448413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20448429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20448409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24102 + ... + 24935.

It is an arithmetic number, because the mean of its divisors is an integer number (3432660).

Almost surely, 2^20448429 is an apocalyptic number.

It is an amenable number.

20448429 is a deficient number, since it is larger than the sum of its proper divisors (7012851).

20448429 is a wasteful number, since it uses less digits than its factorization.

20448429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49179.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 20448429 is about 4521.9939186160. The cubic root of 20448429 is about 273.4554915335.

The spelling of 20448429 in words is "twenty million, four hundred forty-eight thousand, four hundred twenty-nine".