20060055557 has 4 divisors (see below), whose sum is σ = 20069471136. Its totient is φ = 20050639980.

The previous prime is 20060055553. The next prime is 20060055569. The reversal of 20060055557 is 75555006002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20060055557 - 2² = 20060055553 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 (20060055551) 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, 4704593 + ... + 4708854.

It is an arithmetic number, because the mean of its divisors is an integer number (5017367784).

Almost surely, 2^20060055557 is an apocalyptic number.

It is an amenable number.

20060055557 is a deficient number, since it is larger than the sum of its proper divisors (9415579).

20060055557 is an equidigital number, since it uses as much as digits as its factorization.

20060055557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9415578.

The product of its (nonzero) digits is 52500, while the sum is 35.

The spelling of 20060055557 in words is "twenty billion, sixty million, fifty-five thousand, five hundred fifty-seven".