20050407 has 24 divisors (see below), whose sum is σ = 31340400. Its totient is φ = 12279168.

The previous prime is 20050403. The next prime is 20050439. The reversal of 20050407 is 70405002.

It is a happy number.

It is not a de Polignac number, because 20050407 - 2² = 20050403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20050407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47644 + ... + 48062.

It is an arithmetic number, because the mean of its divisors is an integer number (1305850).

Almost surely, 2^20050407 is an apocalyptic number.

20050407 is a deficient number, since it is larger than the sum of its proper divisors (11289993).

20050407 is a wasteful number, since it uses less digits than its factorization.

20050407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20050407 is about 4477.7680824268. The cubic root of 20050407 is about 271.6696130928.

Adding to 20050407 its reverse (70405002), we get a palindrome (90455409).

The spelling of 20050407 in words is "twenty million, fifty thousand, four hundred seven".