20084551 has 4 divisors (see below), whose sum is σ = 20367504. Its totient is φ = 19801600.

The previous prime is 20084549. The next prime is 20084567. The reversal of 20084551 is 15548002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20084551 - 2¹ = 20084549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20084591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141370 + ... + 141511.

It is an arithmetic number, because the mean of its divisors is an integer number (5091876).

Almost surely, 2^20084551 is an apocalyptic number.

20084551 is a deficient number, since it is larger than the sum of its proper divisors (282953).

20084551 is an equidigital number, since it uses as much as digits as its factorization.

20084551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282952.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 20084551 is about 4481.5790743888. The cubic root of 20084551 is about 271.8237351000.

The spelling of 20084551 in words is "twenty million, eighty-four thousand, five hundred fifty-one".