20023310421817 has 32 divisors (see below), whose sum is σ = 20841696691200. Its totient is φ = 19221109705728.

The previous prime is 20023310421811. The next prime is 20023310421859. The reversal of 20023310421817 is 71812401332002.

It is a cyclic number.

It is not a de Polignac number, because 20023310421817 - 2³¹ = 20021162938169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023310421811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4156798593 + ... + 4156803409.

It is an arithmetic number, because the mean of its divisors is an integer number (651303021600).

Almost surely, 2^{20023310421817} is an apocalyptic number.

It is an amenable number.

20023310421817 is a deficient number, since it is larger than the sum of its proper divisors (818386269383).

20023310421817 is a wasteful number, since it uses less digits than its factorization.

20023310421817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9145.

The product of its (nonzero) digits is 16128, while the sum is 34.

Adding to 20023310421817 its reverse (71812401332002), we get a palindrome (91835711753819).

The spelling of 20023310421817 in words is "twenty trillion, twenty-three billion, three hundred ten million, four hundred twenty-one thousand, eight hundred seventeen".