20616644244536 has 8 divisors (see below), whose sum is σ = 38656207958520. Its totient is φ = 10308322122264.

The previous prime is 20616644244517. The next prime is 20616644244589. The reversal of 20616644244536 is 63544244661602.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1288540265276 + ... + 1288540265291.

It is an arithmetic number, because the mean of its divisors is an integer number (4832025994815).

Almost surely, 2^{20616644244536} is an apocalyptic number.

It is an amenable number.

20616644244536 is a deficient number, since it is larger than the sum of its proper divisors (18039563713984).

20616644244536 is a wasteful number, since it uses less digits than its factorization.

20616644244536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577080530573 (or 2577080530569 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 53.

The spelling of 20616644244536 in words is "twenty trillion, six hundred sixteen billion, six hundred forty-four million, two hundred forty-four thousand, five hundred thirty-six".