20205662 has 8 divisors (see below), whose sum is σ = 30328392. Its totient is φ = 10096200.

The previous prime is 20205623. The next prime is 20205697. The reversal of 20205662 is 26650202.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2612 + ... + 6872.

It is an arithmetic number, because the mean of its divisors is an integer number (3791049).

Almost surely, 2^20205662 is an apocalyptic number.

20205662 is a deficient number, since it is larger than the sum of its proper divisors (10122730).

20205662 is a wasteful number, since it uses less digits than its factorization.

20205662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6634.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20205662 is about 4495.0708559488. The cubic root of 20205662 is about 272.3690114775.

Adding to 20205662 its reverse (26650202), we get a palindrome (46855864).

The spelling of 20205662 in words is "twenty million, two hundred five thousand, six hundred sixty-two".