20446401 has 4 divisors (see below), whose sum is σ = 27261872. Its totient is φ = 13630932.

The previous prime is 20446399. The next prime is 20446411. The reversal of 20446401 is 10464402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20446401 - 2¹ = 20446399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20446411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3407731 + ... + 3407736.

It is an arithmetic number, because the mean of its divisors is an integer number (6815468).

Almost surely, 2^20446401 is an apocalyptic number.

It is an amenable number.

20446401 is a deficient number, since it is larger than the sum of its proper divisors (6815471).

20446401 is an equidigital number, since it uses as much as digits as its factorization.

20446401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6815470.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20446401 is about 4521.7696756911. The cubic root of 20446401 is about 273.4464511312.

The spelling of 20446401 in words is "twenty million, four hundred forty-six thousand, four hundred one".