20666373 has 64 divisors (see below), whose sum is σ = 36997632. Its totient is φ = 9953280.

The previous prime is 20666369. The next prime is 20666377. The reversal of 20666373 is 37366602.

It is an interprime number because it is at equal distance from previous prime (20666369) and next prime (20666377).

It is not a de Polignac number, because 20666373 - 2² = 20666369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20666377) 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 63 ways as a sum of consecutive naturals, for example, 283065 + ... + 283137.

It is an arithmetic number, because the mean of its divisors is an integer number (578088).

Almost surely, 2^20666373 is an apocalyptic number.

It is an amenable number.

20666373 is a deficient number, since it is larger than the sum of its proper divisors (16331259).

20666373 is a wasteful number, since it uses less digits than its factorization.

20666373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174.

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 20666373 is about 4546.0282665201. The cubic root of 20666373 is about 274.4235771872.

The spelling of 20666373 in words is "twenty million, six hundred sixty-six thousand, three hundred seventy-three".