20450007 has 6 divisors (see below), whose sum is σ = 29538912. Its totient is φ = 13633332.

The previous prime is 20449999. The next prime is 20450009. The reversal of 20450007 is 70005402.

It is a happy number.

It is not a de Polignac number, because 20450007 - 2³ = 20449999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1136103 + ... + 1136120.

It is an arithmetic number, because the mean of its divisors is an integer number (4923152).

Almost surely, 2^20450007 is an apocalyptic number.

20450007 is a deficient number, since it is larger than the sum of its proper divisors (9088905).

20450007 is a wasteful number, since it uses less digits than its factorization.

20450007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272229 (or 2272226 counting only the distinct ones).

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

The square root of 20450007 is about 4522.1683958031. The cubic root of 20450007 is about 273.4625255158.

Adding to 20450007 its reverse (70005402), we get a palindrome (90455409).

The spelling of 20450007 in words is "twenty million, four hundred fifty thousand, seven".