20450086 has 4 divisors (see below), whose sum is σ = 30675132. Its totient is φ = 10225042.

The previous prime is 20450083. The next prime is 20450107. The reversal of 20450086 is 68005402.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20450086.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 5112520 + ... + 5112523.

It is an arithmetic number, because the mean of its divisors is an integer number (7668783).

Almost surely, 2^20450086 is an apocalyptic number.

20450086 is a deficient number, since it is larger than the sum of its proper divisors (10225046).

20450086 is a wasteful number, since it uses less digits than its factorization.

20450086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10225045.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20450086 is about 4522.1771305423. The cubic root of 20450086 is about 273.4628776512.

Adding to 20450086 its reverse (68005402), we get a palindrome (88455488).

The spelling of 20450086 in words is "twenty million, four hundred fifty thousand, eighty-six".