20335006555 has 4 divisors (see below), whose sum is σ = 24402007872. Its totient is φ = 16268005240.

The previous prime is 20335006507. The next prime is 20335006561. The reversal of 20335006555 is 55560053302.

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

It is not a de Polignac number, because 20335006555 - 2¹³ = 20334998363 is a prime.

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 20335006555.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033500651 + ... + 2033500660.

It is an arithmetic number, because the mean of its divisors is an integer number (6100501968).

Almost surely, 2^20335006555 is an apocalyptic number.

20335006555 is a deficient number, since it is larger than the sum of its proper divisors (4067001317).

20335006555 is an equidigital number, since it uses as much as digits as its factorization.

20335006555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067001316.

The product of its (nonzero) digits is 67500, while the sum is 34.

Adding to 20335006555 its reverse (55560053302), we get a palindrome (75895059857).

The spelling of 20335006555 in words is "twenty billion, three hundred thirty-five million, six thousand, five hundred fifty-five".