20020471 has 8 divisors (see below), whose sum is σ = 21390080. Its totient is φ = 18682488.

The previous prime is 20020463. The next prime is 20020487. The reversal of 20020471 is 17402002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20020471 - 2³ = 20020463 is a prime.

It is a super-3 number, since 3×20020471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6591 + ... + 9136.

It is an arithmetic number, because the mean of its divisors is an integer number (2673760).

Almost surely, 2^20020471 is an apocalyptic number.

20020471 is a deficient number, since it is larger than the sum of its proper divisors (1369609).

20020471 is a wasteful number, since it uses less digits than its factorization.

20020471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15813.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20020471 is about 4474.4240970208. The cubic root of 20020471 is about 271.5343414850.

Adding to 20020471 its reverse (17402002), we get a palindrome (37422473).

The spelling of 20020471 in words is "twenty million, twenty thousand, four hundred seventy-one".