20461668336 has 80 divisors (see below), whose sum is σ = 60098494720. Its totient is φ = 6661932480.

The previous prime is 20461668329. The next prime is 20461668349. The reversal of 20461668336 is 63386616402.

20461668336 is a `hidden beast` number, since 20 + 4 + 616 + 6 + 8 + 3 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20461668291 and 20461668300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532180 + ... + 569331.

It is an arithmetic number, because the mean of its divisors is an integer number (751231184).

Almost surely, 2^20461668336 is an apocalyptic number.

It is an amenable number.

20461668336 is an abundant number, since it is smaller than the sum of its proper divisors (39636826384).

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

20461668336 is a wasteful number, since it uses less digits than its factorization.

20461668336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101571 (or 1101559 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

It can be divided in two parts, 2046166 and 8336, that added together give a palindrome (2054502).

The spelling of 20461668336 in words is "twenty billion, four hundred sixty-one million, six hundred sixty-eight thousand, three hundred thirty-six".