20752971 has 16 divisors (see below), whose sum is σ = 29579904. Its totient is φ = 12896384.

The previous prime is 20752957. The next prime is 20752973. The reversal of 20752971 is 17925702.

It is a cyclic number.

It is not a de Polignac number, because 20752971 - 2⁵ = 20752939 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20752973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3556 + ... + 7358.

It is an arithmetic number, because the mean of its divisors is an integer number (1848744).

Almost surely, 2^20752971 is an apocalyptic number.

20752971 is a deficient number, since it is larger than the sum of its proper divisors (8826933).

20752971 is a wasteful number, since it uses less digits than its factorization.

20752971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 20752971 is about 4555.5428875163. The cubic root of 20752971 is about 274.8063474101.

The spelling of 20752971 in words is "twenty million, seven hundred fifty-two thousand, nine hundred seventy-one".