21060471 has 8 divisors (see below), whose sum is σ = 28162944. Its totient is φ = 13999160.

The previous prime is 21060469. The next prime is 21060491. The reversal of 21060471 is 17406012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21060471 - 2¹ = 21060469 is a prime.

It is a super-3 number, since 3×21060471³ (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 (21060401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9075 + ... + 11156.

It is an arithmetic number, because the mean of its divisors is an integer number (3520368).

Almost surely, 2^21060471 is an apocalyptic number.

21060471 is a deficient number, since it is larger than the sum of its proper divisors (7102473).

21060471 is a wasteful number, since it uses less digits than its factorization.

21060471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20581.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21060471 is about 4589.1688790019. The cubic root of 21060471 is about 276.1569811649.

Adding to 21060471 its reverse (17406012), we get a palindrome (38466483).

The spelling of 21060471 in words is "twenty-one million, sixty thousand, four hundred seventy-one".