20005216232453 has 16 divisors (see below), whose sum is σ = 20654840203200. Its totient is φ = 19367704752000.

The previous prime is 20005216232447. The next prime is 20005216232483. The reversal of 20005216232453 is 35423261250002.

It is a cyclic number.

It is not a de Polignac number, because 20005216232453 - 2²⁴ = 20005199455237 is a prime.

It is a super-3 number, since 3×20005216232453³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005216232423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6271226 + ... + 8907227.

It is an arithmetic number, because the mean of its divisors is an integer number (1290927512700).

Almost surely, 2^{20005216232453} is an apocalyptic number.

It is an amenable number.

20005216232453 is a deficient number, since it is larger than the sum of its proper divisors (649623970747).

20005216232453 is a wasteful number, since it uses less digits than its factorization.

20005216232453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15178852.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 20005216232453 its reverse (35423261250002), we get a palindrome (55428477482455).

The spelling of 20005216232453 in words is "twenty trillion, five billion, two hundred sixteen million, two hundred thirty-two thousand, four hundred fifty-three".