20863271 has 8 divisors (see below), whose sum is σ = 24510864. Its totient is φ = 17507520.

The previous prime is 20863247. The next prime is 20863289. The reversal of 20863271 is 17236802.

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 20863271 - 2⁶ = 20863207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20866271) 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, 72806 + ... + 73091.

It is an arithmetic number, because the mean of its divisors is an integer number (3063858).

Almost surely, 2^20863271 is an apocalyptic number.

20863271 is a deficient number, since it is larger than the sum of its proper divisors (3647593).

20863271 is a wasteful number, since it uses less digits than its factorization.

20863271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145921.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20863271 is about 4567.6329756232. The cubic root of 20863271 is about 275.2923436542.

The spelling of 20863271 in words is "twenty million, eight hundred sixty-three thousand, two hundred seventy-one".