20871473 has 8 divisors (see below), whose sum is σ = 24014400. Its totient is φ = 17768880.

The previous prime is 20871449. The next prime is 20871491. The reversal of 20871473 is 37417802.

It is a happy number.

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 20871473 - 2⁸ = 20871217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20871413) 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, 8963 + ... + 11048.

It is an arithmetic number, because the mean of its divisors is an integer number (3001800).

Almost surely, 2^20871473 is an apocalyptic number.

It is an amenable number.

20871473 is a deficient number, since it is larger than the sum of its proper divisors (3142927).

20871473 is a wasteful number, since it uses less digits than its factorization.

20871473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20167.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 20871473 is about 4568.5307266122. The cubic root of 20871473 is about 275.3284142521.

The spelling of 20871473 in words is "twenty million, eight hundred seventy-one thousand, four hundred seventy-three".