20555489067 has 4 divisors (see below), whose sum is σ = 27407318760. Its totient is φ = 13703659376.

The previous prime is 20555489051. The next prime is 20555489107. The reversal of 20555489067 is 76098455502.

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 20555489067 - 2⁴ = 20555489051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20555489267) 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, 3425914842 + ... + 3425914847.

It is an arithmetic number, because the mean of its divisors is an integer number (6851829690).

Almost surely, 2^20555489067 is an apocalyptic number.

20555489067 is a deficient number, since it is larger than the sum of its proper divisors (6851829693).

20555489067 is an equidigital number, since it uses as much as digits as its factorization.

20555489067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851829692.

The product of its (nonzero) digits is 3024000, while the sum is 51.

The spelling of 20555489067 in words is "twenty billion, five hundred fifty-five million, four hundred eighty-nine thousand, sixty-seven".