20551548889 has 8 divisors (see below), whose sum is σ = 20788867008. Its totient is φ = 20315591280.

The previous prime is 20551548887. The next prime is 20551548893. The reversal of 20551548889 is 98884515502.

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 20551548889 - 2¹ = 20551548887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20551548887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309727 + ... + 370180.

It is an arithmetic number, because the mean of its divisors is an integer number (2598608376).

Almost surely, 2^20551548889 is an apocalyptic number.

It is an amenable number.

20551548889 is a deficient number, since it is larger than the sum of its proper divisors (237318119).

20551548889 is a wasteful number, since it uses less digits than its factorization.

20551548889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680255.

The product of its (nonzero) digits is 4608000, while the sum is 55.

The spelling of 20551548889 in words is "twenty billion, five hundred fifty-one million, five hundred forty-eight thousand, eight hundred eighty-nine".