20005216232454 has 48 divisors (see below), whose sum is σ = 43458291498960. Its totient is φ = 6650921586240.

The previous prime is 20005216232447. The next prime is 20005216232483. The reversal of 20005216232454 is 45423261250002.

20005216232454 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 5 + 2 + 1 + 623 + 24 + 5 + 4 = 666.

It is a super-3 number, since 3×20005216232454³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161901504 + ... + 162025020.

It is an arithmetic number, because the mean of its divisors is an integer number (905381072895).

Almost surely, 2^{20005216232454} is an apocalyptic number.

20005216232454 is an abundant number, since it is smaller than the sum of its proper divisors (23453075266506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20005216232454 is a wasteful number, since it uses less digits than its factorization.

20005216232454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147045 (or 147042 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 20005216232454 its reverse (45423261250002), we get a palindrome (65428477482456).

The spelling of 20005216232454 in words is "twenty trillion, five billion, two hundred sixteen million, two hundred thirty-two thousand, four hundred fifty-four".