20601664413471 has 24 divisors (see below), whose sum is σ = 30467659944384. Its totient is φ = 13408361144640.

The previous prime is 20601664413431. The next prime is 20601664413493. The reversal of 20601664413471 is 17431446610602.

20601664413471 is a `hidden beast` number, since 2 + 0 + 6 + 0 + 166 + 4 + 4 + 13 + 471 = 666.

It is not a de Polignac number, because 20601664413471 - 2¹⁰ = 20601664412447 is a prime.

It is a super-3 number, since 3×20601664413471³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601664413431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61171740 + ... + 61507601.

It is an arithmetic number, because the mean of its divisors is an integer number (1269485831016).

Almost surely, 2^{20601664413471} is an apocalyptic number.

20601664413471 is a deficient number, since it is larger than the sum of its proper divisors (9865995530913).

20601664413471 is a wasteful number, since it uses less digits than its factorization.

20601664413471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122679791 (or 122679788 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20601664413471 in words is "twenty trillion, six hundred one billion, six hundred sixty-four million, four hundred thirteen thousand, four hundred seventy-one".