20200565551 has 4 divisors (see below), whose sum is σ = 20218554712. Its totient is φ = 20182576392.

The previous prime is 20200565527. The next prime is 20200565563. The reversal of 20200565551 is 15556500202.

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 20200565551 - 2¹¹ = 20200563503 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 (20200565951) 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, 8992896 + ... + 8995141.

It is an arithmetic number, because the mean of its divisors is an integer number (5054638678).

Almost surely, 2^20200565551 is an apocalyptic number.

20200565551 is a deficient number, since it is larger than the sum of its proper divisors (17989161).

20200565551 is a wasteful number, since it uses less digits than its factorization.

20200565551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17989160.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 20200565551 in words is "twenty billion, two hundred million, five hundred sixty-five thousand, five hundred fifty-one".