20446407 has 12 divisors (see below), whose sum is σ = 30018664. Its totient is φ = 13407120.

The previous prime is 20446399. The next prime is 20446411. The reversal of 20446407 is 70464402.

It is not a de Polignac number, because 20446407 - 2³ = 20446399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20446417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18073 + ... + 19170.

Almost surely, 2^20446407 is an apocalyptic number.

20446407 is a deficient number, since it is larger than the sum of its proper divisors (9572257).

20446407 is a wasteful number, since it uses less digits than its factorization.

20446407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37310 (or 37307 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20446407 is about 4521.7703391482. The cubic root of 20446407 is about 273.4464778788.

The spelling of 20446407 in words is "twenty million, four hundred forty-six thousand, four hundred seven".