20668007 has 8 divisors (see below), whose sum is σ = 21632640. Its totient is φ = 19708920.

The previous prime is 20667973. The next prime is 20668027. The reversal of 20668007 is 70086602.

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

It is a cyclic number.

It is not a de Polignac number, because 20668007 - 2⁶ = 20667943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20668027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7532 + ... + 9902.

It is an arithmetic number, because the mean of its divisors is an integer number (2704080).

Almost surely, 2^20668007 is an apocalyptic number.

20668007 is a deficient number, since it is larger than the sum of its proper divisors (964633).

20668007 is a wasteful number, since it uses less digits than its factorization.

20668007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20668007 is about 4546.2079802842. The cubic root of 20668007 is about 274.4308094884.

The spelling of 20668007 in words is "twenty million, six hundred sixty-eight thousand, seven".