20450636738615 has 8 divisors (see below), whose sum is σ = 25139319308208. Its totient is φ = 15961472576320.

The previous prime is 20450636738557. The next prime is 20450636738629. The reversal of 20450636738615 is 51683763605402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20450636738615 - 2⁸ = 20450636738359 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 49879601597 + ... + 49879602006.

It is an arithmetic number, because the mean of its divisors is an integer number (3142414913526).

Almost surely, 2^{20450636738615} is an apocalyptic number.

20450636738615 is a deficient number, since it is larger than the sum of its proper divisors (4688682569593).

20450636738615 is an equidigital number, since it uses as much as digits as its factorization.

20450636738615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99759203649.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 20450636738615 in words is "twenty trillion, four hundred fifty billion, six hundred thirty-six million, seven hundred thirty-eight thousand, six hundred fifteen".