20324578655 has 16 divisors (see below), whose sum is σ = 24609291264. Its totient is φ = 16113676800.

The previous prime is 20324578649. The next prime is 20324578661. The reversal of 20324578655 is 55687542302.

It is an interprime number because it is at equal distance from previous prime (20324578649) and next prime (20324578661).

It is not a de Polignac number, because 20324578655 - 2¹⁰ = 20324577631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266855 + ... + 334455.

It is an arithmetic number, because the mean of its divisors is an integer number (1538080704).

Almost surely, 2^20324578655 is an apocalyptic number.

20324578655 is a deficient number, since it is larger than the sum of its proper divisors (4284712609).

20324578655 is a wasteful number, since it uses less digits than its factorization.

20324578655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68146.

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 20324578655 in words is "twenty billion, three hundred twenty-four million, five hundred seventy-eight thousand, six hundred fifty-five".