20554513 has 16 divisors (see below), whose sum is σ = 25349760. Its totient is φ = 16263936.

The previous prime is 20554493. The next prime is 20554517. The reversal of 20554513 is 31545502.

It is a cyclic number.

It is not a de Polignac number, because 20554513 - 2¹³ = 20546321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20554517) 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 15 ways as a sum of consecutive naturals, for example, 4678 + ... + 7936.

It is an arithmetic number, because the mean of its divisors is an integer number (1584360).

Almost surely, 2^20554513 is an apocalyptic number.

It is an amenable number.

20554513 is a deficient number, since it is larger than the sum of its proper divisors (4795247).

20554513 is a wasteful number, since it uses less digits than its factorization.

20554513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 20554513 is about 4533.7085261406. The cubic root of 20554513 is about 273.9275609027.

The spelling of 20554513 in words is "twenty million, five hundred fifty-four thousand, five hundred thirteen".