20471606 has 4 divisors (see below), whose sum is σ = 30707412. Its totient is φ = 10235802.

The previous prime is 20471603. The next prime is 20471639. The reversal of 20471606 is 60617402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20471603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5117900 + ... + 5117903.

It is an arithmetic number, because the mean of its divisors is an integer number (7676853).

Almost surely, 2^20471606 is an apocalyptic number.

20471606 is a deficient number, since it is larger than the sum of its proper divisors (10235806).

20471606 is a wasteful number, since it uses less digits than its factorization.

20471606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10235805.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20471606 is about 4524.5558898084. Note that the first 3 decimals coincide. The cubic root of 20471606 is about 273.5587673549.

The spelling of 20471606 in words is "twenty million, four hundred seventy-one thousand, six hundred six".