20055054399 has 4 divisors (see below), whose sum is σ = 26740072536. Its totient is φ = 13370036264.

The previous prime is 20055054373. The next prime is 20055054419. The reversal of 20055054399 is 99345055002.

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 20055054399 - 2¹¹ = 20055052351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20055054399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055054319) 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, 3342509064 + ... + 3342509069.

It is an arithmetic number, because the mean of its divisors is an integer number (6685018134).

Almost surely, 2^20055054399 is an apocalyptic number.

20055054399 is a deficient number, since it is larger than the sum of its proper divisors (6685018137).

20055054399 is an equidigital number, since it uses as much as digits as its factorization.

20055054399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6685018136.

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 20055054399 in words is "twenty billion, fifty-five million, fifty-four thousand, three hundred ninety-nine".