20650386 has 16 divisors (see below), whose sum is σ = 41867424. Its totient is φ = 6789024.

The previous prime is 20650381. The next prime is 20650387. The reversal of 20650386 is 68305602.

It is not an unprimeable number, because it can be changed into a prime (20650381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23136 + ... + 24011.

It is an arithmetic number, because the mean of its divisors is an integer number (2616714).

Almost surely, 2^20650386 is an apocalyptic number.

20650386 is an abundant number, since it is smaller than the sum of its proper divisors (21217038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20650386 is a wasteful number, since it uses less digits than its factorization.

20650386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47225.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20650386 is about 4544.2695782711. The cubic root of 20650386 is about 274.3527964799.

Adding to 20650386 its reverse (68305602), we get a palindrome (88955988).

The spelling of 20650386 in words is "twenty million, six hundred fifty thousand, three hundred eighty-six".