20006454 has 16 divisors (see below), whose sum is σ = 43090992. Its totient is φ = 6155808.

The previous prime is 20006431. The next prime is 20006489. The reversal of 20006454 is 45460002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20006454.

It is a congruent number.

It is an unprimeable number.

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, 128169 + ... + 128324.

It is an arithmetic number, because the mean of its divisors is an integer number (2693187).

Almost surely, 2^20006454 is an apocalyptic number.

20006454 is an abundant number, since it is smaller than the sum of its proper divisors (23084538).

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

20006454 is a wasteful number, since it uses less digits than its factorization.

20006454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256511.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20006454 is about 4472.8574759319. The cubic root of 20006454 is about 271.4709566048.

Adding to 20006454 its reverse (45460002), we get a palindrome (65466456).

The spelling of 20006454 in words is "twenty million, six thousand, four hundred fifty-four".