20714971 has 4 divisors (see below), whose sum is σ = 20795832. Its totient is φ = 20634112.

The previous prime is 20714957. The next prime is 20714977. The reversal of 20714971 is 17941702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20714971 is a prime.

It is a super-2 number, since 2×20714971² = 858220047061682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20714977) 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, 40045 + ... + 40558.

It is an arithmetic number, because the mean of its divisors is an integer number (5198958).

Almost surely, 2^20714971 is an apocalyptic number.

20714971 is a deficient number, since it is larger than the sum of its proper divisors (80861).

20714971 is an equidigital number, since it uses as much as digits as its factorization.

20714971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80860.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 20714971 is about 4551.3702332375. The cubic root of 20714971 is about 274.6385156748.

The spelling of 20714971 in words is "twenty million, seven hundred fourteen thousand, nine hundred seventy-one".