20646662 has 8 divisors (see below), whose sum is σ = 31003392. Its totient is φ = 10312200.

The previous prime is 20646631. The next prime is 20646667. The reversal of 20646662 is 26664602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20646667) 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 3 ways as a sum of consecutive naturals, for example, 3014 + ... + 7097.

It is an arithmetic number, because the mean of its divisors is an integer number (3875424).

Almost surely, 2^20646662 is an apocalyptic number.

20646662 is a deficient number, since it is larger than the sum of its proper divisors (10356730).

20646662 is a wasteful number, since it uses less digits than its factorization.

20646662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 20646662 is about 4543.8598129784. The cubic root of 20646662 is about 274.3363036286.

The spelling of 20646662 in words is "twenty million, six hundred forty-six thousand, six hundred sixty-two".