20541471 has 4 divisors (see below), whose sum is σ = 27388632. Its totient is φ = 13694312.

The previous prime is 20541449. The next prime is 20541497. The reversal of 20541471 is 17414502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20541471 - 2⁶ = 20541407 is a prime.

It is a super-3 number, since 3×20541471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541431) 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 3 ways as a sum of consecutive naturals, for example, 3423576 + ... + 3423581.

It is an arithmetic number, because the mean of its divisors is an integer number (6847158).

Almost surely, 2^20541471 is an apocalyptic number.

20541471 is a deficient number, since it is larger than the sum of its proper divisors (6847161).

20541471 is an equidigital number, since it uses as much as digits as its factorization.

20541471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847160.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 20541471 is about 4532.2699610681. The cubic root of 20541471 is about 273.8696122481.

Adding to 20541471 its reverse (17414502), we get a palindrome (37955973).

It can be divided in two parts, 20541 and 471, that added together give a palindrome (21012).

The spelling of 20541471 in words is "twenty million, five hundred forty-one thousand, four hundred seventy-one".