20326415663 has 8 divisors (see below), whose sum is σ = 21241659648. Its totient is φ = 19431287064.

The previous prime is 20326415657. The next prime is 20326415693. The reversal of 20326415663 is 36651462302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20326415663 - 2⁸ = 20326415407 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 (20326415693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5026781 + ... + 5030822.

It is an arithmetic number, because the mean of its divisors is an integer number (2655207456).

Almost surely, 2^20326415663 is an apocalyptic number.

20326415663 is a deficient number, since it is larger than the sum of its proper divisors (915243985).

20326415663 is a wasteful number, since it uses less digits than its factorization.

20326415663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10057693.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 20326415663 its reverse (36651462302), we get a palindrome (56977877965).

The spelling of 20326415663 in words is "twenty billion, three hundred twenty-six million, four hundred fifteen thousand, six hundred sixty-three".