20636367655 has 16 divisors (see below), whose sum is σ = 24838206624. Its totient is φ = 16459447680.

The previous prime is 20636367623. The next prime is 20636367667. The reversal of 20636367655 is 55676363602.

It is not a de Polignac number, because 20636367655 - 2⁵ = 20636367623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20636367599 and 20636367608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3415297 + ... + 3421333.

It is an arithmetic number, because the mean of its divisors is an integer number (1552387914).

Almost surely, 2^20636367655 is an apocalyptic number.

20636367655 is a deficient number, since it is larger than the sum of its proper divisors (4201838969).

20636367655 is a wasteful number, since it uses less digits than its factorization.

20636367655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986.

The product of its (nonzero) digits is 4082400, while the sum is 49.

The spelling of 20636367655 in words is "twenty billion, six hundred thirty-six million, three hundred sixty-seven thousand, six hundred fifty-five".