20452471 has 8 divisors (see below), whose sum is σ = 22143744. Its totient is φ = 18778080.

The previous prime is 20452469. The next prime is 20452499. The reversal of 20452471 is 17425402.

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 20452471 - 2¹ = 20452469 is a prime.

It is a super-3 number, since 3×20452471³ (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 (20452171) 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, 1636 + ... + 6601.

It is an arithmetic number, because the mean of its divisors is an integer number (2767968).

Almost surely, 2^20452471 is an apocalyptic number.

20452471 is a deficient number, since it is larger than the sum of its proper divisors (1691273).

20452471 is a wasteful number, since it uses less digits than its factorization.

20452471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8441.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20452471 is about 4522.4408232723. The cubic root of 20452471 is about 273.4735081462.

Adding to 20452471 its reverse (17425402), we get a palindrome (37877873).

The spelling of 20452471 in words is "twenty million, four hundred fifty-two thousand, four hundred seventy-one".