20547671 has 8 divisors (see below), whose sum is σ = 21600864. Its totient is φ = 19507840.

The previous prime is 20547661. The next prime is 20547673. The reversal of 20547671 is 17674502.

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 20547671 - 2¹⁸ = 20285527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547673) 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, 110 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (2700108).

Almost surely, 2^20547671 is an apocalyptic number.

20547671 is a deficient number, since it is larger than the sum of its proper divisors (1053193).

20547671 is a wasteful number, since it uses less digits than its factorization.

20547671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6681.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20547671 is about 4532.9538934342. The cubic root of 20547671 is about 273.8971633550.

The spelling of 20547671 in words is "twenty million, five hundred forty-seven thousand, six hundred seventy-one".