20605486 has 16 divisors (see below), whose sum is σ = 34881840. Its totient is φ = 9042880.

The previous prime is 20605477. The next prime is 20605531. The reversal of 20605486 is 68450602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15511 + ... + 16786.

It is an arithmetic number, because the mean of its divisors is an integer number (2180115).

Almost surely, 2^20605486 is an apocalyptic number.

20605486 is a deficient number, since it is larger than the sum of its proper divisors (14276354).

20605486 is a wasteful number, since it uses less digits than its factorization.

20605486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32339.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20605486 is about 4539.3266020413. The cubic root of 20605486 is about 274.1538110254.

It can be divided in two parts, 20 and 605486, that added together give a palindrome (605506).

The spelling of 20605486 in words is "twenty million, six hundred five thousand, four hundred eighty-six".