20369554279 has 4 divisors (see below), whose sum is σ = 20369925576. Its totient is φ = 20369182984.

The previous prime is 20369554253. The next prime is 20369554291. The reversal of 20369554279 is 97245596302.

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 20369554279 - 2¹⁵ = 20369521511 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 (20369554229) 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, 85264 + ... + 219109.

It is an arithmetic number, because the mean of its divisors is an integer number (5092481394).

Almost surely, 2^20369554279 is an apocalyptic number.

20369554279 is a deficient number, since it is larger than the sum of its proper divisors (371297).

20369554279 is an equidigital number, since it uses as much as digits as its factorization.

20369554279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371296.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 20369554279 in words is "twenty billion, three hundred sixty-nine million, five hundred fifty-four thousand, two hundred seventy-nine".