20471679 has 12 divisors (see below), whose sum is σ = 30856176. Its totient is φ = 13054272.

The previous prime is 20471663. The next prime is 20471699. The reversal of 20471679 is 97617402.

It is a happy number.

It is not a de Polignac number, because 20471679 - 2⁴ = 20471663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20471639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49242 + ... + 49655.

It is an arithmetic number, because the mean of its divisors is an integer number (2571348).

Almost surely, 2^20471679 is an apocalyptic number.

20471679 is a deficient number, since it is larger than the sum of its proper divisors (10384497).

20471679 is a wasteful number, since it uses less digits than its factorization.

20471679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98926 (or 98923 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20471679 is about 4524.5639568913. The cubic root of 20471679 is about 273.5590925169.

The spelling of 20471679 in words is "twenty million, four hundred seventy-one thousand, six hundred seventy-nine".