20666614 has 4 divisors (see below), whose sum is σ = 30999924. Its totient is φ = 10333306.

The previous prime is 20666603. The next prime is 20666621. The reversal of 20666614 is 41666602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41666602 = 2 ⋅20833301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5166652 + ... + 5166655.

It is an arithmetic number, because the mean of its divisors is an integer number (7749981).

Almost surely, 2^20666614 is an apocalyptic number.

20666614 is a deficient number, since it is larger than the sum of its proper divisors (10333310).

20666614 is a wasteful number, since it uses less digits than its factorization.

20666614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10333309.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20666614 is about 4546.0547730972. The cubic root of 20666614 is about 274.4246439092.

The spelling of 20666614 in words is "twenty million, six hundred sixty-six thousand, six hundred fourteen".