21477902001471 has 12 divisors (see below), whose sum is σ = 31065960430648. Its totient is φ = 14299067085264.

The previous prime is 21477902001461. The next prime is 21477902001511. The reversal of 21477902001471 is 17410020977412.

21477902001471 is a `hidden beast` number, since 2 + 1 + 4 + 77 + 90 + 20 + 0 + 1 + 471 = 666.

It is not a de Polignac number, because 21477902001471 - 2¹¹ = 21477901999423 is a prime.

It is a super-3 number, since 3×21477902001471³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477902001401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1627847125 + ... + 1627860318.

Almost surely, 2^{21477902001471} is an apocalyptic number.

21477902001471 is a deficient number, since it is larger than the sum of its proper divisors (9588058429177).

21477902001471 is a wasteful number, since it uses less digits than its factorization.

21477902001471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255708182 (or 3255708179 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

Adding to 21477902001471 its reverse (17410020977412), we get a palindrome (38887922978883).

The spelling of 21477902001471 in words is "twenty-one trillion, four hundred seventy-seven billion, nine hundred two million, one thousand, four hundred seventy-one".