20450087 has 8 divisors (see below), whose sum is σ = 23494176. Its totient is φ = 17436672.

The previous prime is 20450083. The next prime is 20450107. The reversal of 20450087 is 78005402.

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

It is a cyclic number.

It is not a de Polignac number, because 20450087 - 2² = 20450083 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 (20450083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6218 + ... + 8919.

It is an arithmetic number, because the mean of its divisors is an integer number (2936772).

Almost surely, 2^20450087 is an apocalyptic number.

20450087 is a deficient number, since it is larger than the sum of its proper divisors (3044089).

20450087 is a wasteful number, since it uses less digits than its factorization.

20450087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15337.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 20450087 is about 4522.1772411085. The cubic root of 20450087 is about 273.4628821086.

Adding to 20450087 its reverse (78005402), we get a palindrome (98455489).

The spelling of 20450087 in words is "twenty million, four hundred fifty thousand, eighty-seven".