20401449 has 8 divisors (see below), whose sum is σ = 27715392. Its totient is φ = 13344240.

The previous prime is 20401439. The next prime is 20401453. The reversal of 20401449 is 94410402.

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

It is not a de Polignac number, because 20401449 - 2⁷ = 20401321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20401429) by changing a digit.

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, 63997 + ... + 64314.

It is an arithmetic number, because the mean of its divisors is an integer number (3464424).

Almost surely, 2^20401449 is an apocalyptic number.

It is an amenable number.

20401449 is a deficient number, since it is larger than the sum of its proper divisors (7313943).

20401449 is a wasteful number, since it uses less digits than its factorization.

20401449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128367.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20401449 is about 4516.7963204023. The cubic root of 20401449 is about 273.2459108019.

The spelling of 20401449 in words is "twenty million, four hundred one thousand, four hundred forty-nine".