20552027399 has 4 divisors (see below), whose sum is σ = 20555755440. Its totient is φ = 20548299360.

The previous prime is 20552027383. The next prime is 20552027411. The reversal of 20552027399 is 99372025502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99372025502 = 2 ⋅49686012751.

It is a cyclic number.

It is not a de Polignac number, because 20552027399 - 2⁴ = 20552027383 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 (20552027329) 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, 1855739 + ... + 1866780.

It is an arithmetic number, because the mean of its divisors is an integer number (5138938860).

Almost surely, 2^20552027399 is an apocalyptic number.

20552027399 is a deficient number, since it is larger than the sum of its proper divisors (3728041).

20552027399 is an equidigital number, since it uses as much as digits as its factorization.

20552027399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728040.

The product of its (nonzero) digits is 340200, while the sum is 44.

The spelling of 20552027399 in words is "twenty billion, five hundred fifty-two million, twenty-seven thousand, three hundred ninety-nine".