20964171 has 4 divisors (see below), whose sum is σ = 27952232. Its totient is φ = 13976112.

The previous prime is 20964169. The next prime is 20964197. The reversal of 20964171 is 17146902.

It is a happy number.

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

It is not a de Polignac number, because 20964171 - 2¹ = 20964169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20964121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3494026 + ... + 3494031.

It is an arithmetic number, because the mean of its divisors is an integer number (6988058).

Almost surely, 2^20964171 is an apocalyptic number.

20964171 is a deficient number, since it is larger than the sum of its proper divisors (6988061).

20964171 is an equidigital number, since it uses as much as digits as its factorization.

20964171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6988060.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 20964171 is about 4578.6647616964. The cubic root of 20964171 is about 275.7354243607.

The spelling of 20964171 in words is "twenty million, nine hundred sixty-four thousand, one hundred seventy-one".