20668450 has 24 divisors (see below), whose sum is σ = 41939280. Its totient is φ = 7515600.

The previous prime is 20668429. The next prime is 20668451. The reversal of 20668450 is 5486602.

It is not an unprimeable number, because it can be changed into a prime (20668451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18240 + ... + 19339.

It is an arithmetic number, because the mean of its divisors is an integer number (1747470).

Almost surely, 2^20668450 is an apocalyptic number.

20668450 is an abundant number, since it is smaller than the sum of its proper divisors (21270830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20668450 is a wasteful number, since it uses less digits than its factorization.

20668450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37602 (or 37597 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20668450 is about 4546.2567019472. The cubic root of 20668450 is about 274.4327701997.

The spelling of 20668450 in words is "twenty million, six hundred sixty-eight thousand, four hundred fifty".