20476471 has 16 divisors (see below), whose sum is σ = 22429440. Its totient is φ = 18627840.

The previous prime is 20476459. The next prime is 20476487. The reversal of 20476471 is 17467402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20476471 is a prime.

It is a super-3 number, since 3×20476471³ (a number of 23 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 (20476441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57831 + ... + 58183.

It is an arithmetic number, because the mean of its divisors is an integer number (1401840).

Almost surely, 2^20476471 is an apocalyptic number.

20476471 is a deficient number, since it is larger than the sum of its proper divisors (1952969).

20476471 is a wasteful number, since it uses less digits than its factorization.

20476471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 20476471 is about 4525.0934796974. The cubic root of 20476471 is about 273.5804357085.

The spelling of 20476471 in words is "twenty million, four hundred seventy-six thousand, four hundred seventy-one".