20544216413 has 16 divisors (see below), whose sum is σ = 23971132416. Its totient is φ = 17242899840.

The previous prime is 20544216391. The next prime is 20544216419. The reversal of 20544216413 is 31461244502.

It is a cyclic number.

It is not a de Polignac number, because 20544216413 - 2¹² = 20544212317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20544216413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544216419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12656 + ... + 203097.

It is an arithmetic number, because the mean of its divisors is an integer number (1498195776).

Almost surely, 2^20544216413 is an apocalyptic number.

It is an amenable number.

20544216413 is a deficient number, since it is larger than the sum of its proper divisors (3426916003).

20544216413 is a wasteful number, since it uses less digits than its factorization.

20544216413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216044.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 20544216413 in words is "twenty billion, five hundred forty-four million, two hundred sixteen thousand, four hundred thirteen".