20509114 has 8 divisors (see below), whose sum is σ = 30884148. Its totient is φ = 10214400.

The previous prime is 20509109. The next prime is 20509117. The reversal of 20509114 is 41190502.

It can be written as a sum of positive squares in 2 ways, for example, as 20475625 + 33489 = 4525^2 + 183^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20509117) 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, 19437 + ... + 20464.

Almost surely, 2^20509114 is an apocalyptic number.

20509114 is a deficient number, since it is larger than the sum of its proper divisors (10375034).

20509114 is a wasteful number, since it uses less digits than its factorization.

20509114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40160.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 20509114 is about 4528.6989301564. The cubic root of 20509114 is about 273.7257365400.

Adding to 20509114 its reverse (41190502), we get a palindrome (61699616).

The spelling of 20509114 in words is "twenty million, five hundred nine thousand, one hundred fourteen".