20551014205 has 8 divisors (see below), whose sum is σ = 25126523352. Its totient is φ = 16130607168.

The previous prime is 20551014191. The next prime is 20551014221. The reversal of 20551014205 is 50241015502.

It can be written as a sum of positive squares in 4 ways, for example, as 2368379556 + 18182634649 = 48666^2 + 134843^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20551014205 - 2²⁹ = 20014143293 is a prime.

It is a super-2 number, since 2×20551014205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20551014205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38775234 + ... + 38775763.

It is an arithmetic number, because the mean of its divisors is an integer number (3140815419).

Almost surely, 2^20551014205 is an apocalyptic number.

It is an amenable number.

20551014205 is a deficient number, since it is larger than the sum of its proper divisors (4575509147).

20551014205 is an equidigital number, since it uses as much as digits as its factorization.

20551014205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77551055.

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 20551014205 its reverse (50241015502), we get a palindrome (70792029707).

The spelling of 20551014205 in words is "twenty billion, five hundred fifty-one million, fourteen thousand, two hundred five".