20022471 has 48 divisors (see below), whose sum is σ = 34944000. Its totient is φ = 11220768.

The previous prime is 20022467. The next prime is 20022493. The reversal of 20022471 is 17422002.

It is not a de Polignac number, because 20022471 - 2² = 20022467 is a prime.

It is a super-3 number, since 3×20022471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134305 + ... + 134453.

It is an arithmetic number, because the mean of its divisors is an integer number (728000).

Almost surely, 2^20022471 is an apocalyptic number.

20022471 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20022471 is a deficient number, since it is larger than the sum of its proper divisors (14921529).

20022471 is an equidigital number, since it uses as much as digits as its factorization.

20022471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20022471 is about 4474.6475838886. The cubic root of 20022471 is about 271.5433830738.

Adding to 20022471 its reverse (17422002), we get a palindrome (37444473).

The spelling of 20022471 in words is "twenty million, twenty-two thousand, four hundred seventy-one".