20416335320501 has 4 divisors (see below), whose sum is σ = 20914294718604. Its totient is φ = 19918375922400.

The previous prime is 20416335320489. The next prime is 20416335320539. The reversal of 20416335320501 is 10502353361402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2967953700625 + 17448381619876 = 1722775^2 + 4177126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20416335320501 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 (20416335320581) 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, 248979698990 + ... + 248979699071.

It is an arithmetic number, because the mean of its divisors is an integer number (5228573679651).

Almost surely, 2^{20416335320501} is an apocalyptic number.

It is an amenable number.

20416335320501 is a deficient number, since it is larger than the sum of its proper divisors (497959398103).

20416335320501 is an equidigital number, since it uses as much as digits as its factorization.

20416335320501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497959398102.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 20416335320501 its reverse (10502353361402), we get a palindrome (30918688681903).

The spelling of 20416335320501 in words is "twenty trillion, four hundred sixteen billion, three hundred thirty-five million, three hundred twenty thousand, five hundred one".