20454516 has 36 divisors (see below), whose sum is σ = 51952992. Its totient is φ = 6785424.

The previous prime is 20454481. The next prime is 20454523. The reversal of 20454516 is 61545402.

20454516 is a `hidden beast` number, since 204 + 5 + 451 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20454516.

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 11 ways as a sum of consecutive naturals, for example, 6921 + ... + 9423.

Almost surely, 2^20454516 is an apocalyptic number.

It is an amenable number.

20454516 is an abundant number, since it is smaller than the sum of its proper divisors (31498476).

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

20454516 is a wasteful number, since it uses less digits than its factorization.

20454516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20454516 is about 4522.6669123428. Note that the first 3 decimals coincide. The cubic root of 20454516 is about 273.4826225246.

Adding to 20454516 its reverse (61545402), we get a palindrome (81999918).

It can be divided in two parts, 2045 and 4516, that added together give a 8-th power (6561 = 3⁸).

The spelling of 20454516 in words is "twenty million, four hundred fifty-four thousand, five hundred sixteen".