20471698 has 16 divisors (see below), whose sum is σ = 33840576. Its totient is φ = 9228240.

The previous prime is 20471663. The next prime is 20471699. The reversal of 20471698 is 89617402.

It is not an unprimeable number, because it can be changed into a prime (20471699) 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 7 ways as a sum of consecutive naturals, for example, 8038 + ... + 10273.

It is an arithmetic number, because the mean of its divisors is an integer number (2115036).

Almost surely, 2^20471698 is an apocalyptic number.

20471698 is a deficient number, since it is larger than the sum of its proper divisors (13368878).

20471698 is a wasteful number, since it uses less digits than its factorization.

20471698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18369.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20471698 is about 4524.5660565407. The cubic root of 20471698 is about 273.5591771480.

The spelling of 20471698 in words is "twenty million, four hundred seventy-one thousand, six hundred ninety-eight".