20668454 has 16 divisors (see below), whose sum is σ = 31579200. Its totient is φ = 10143744.

The previous prime is 20668451. The next prime is 20668477. The reversal of 20668454 is 45486602.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20668451) 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 7 ways as a sum of consecutive naturals, for example, 40352 + ... + 40860.

It is an arithmetic number, because the mean of its divisors is an integer number (1973700).

Almost surely, 2^20668454 is an apocalyptic number.

20668454 is a deficient number, since it is larger than the sum of its proper divisors (10910746).

20668454 is a wasteful number, since it uses less digits than its factorization.

20668454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 20668454 is about 4546.2571418696. The cubic root of 20668454 is about 274.4327879035.

The spelling of 20668454 in words is "twenty million, six hundred sixty-eight thousand, four hundred fifty-four".