20472571 has 8 divisors (see below), whose sum is σ = 23968224. Its totient is φ = 17119680.

The previous prime is 20472559. The next prime is 20472583. The reversal of 20472571 is 17527402.

It is an interprime number because it is at equal distance from previous prime (20472559) and next prime (20472583).

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 20472571 - 2¹⁵ = 20439803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20472511) 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, 35380 + ... + 35953.

It is an arithmetic number, because the mean of its divisors is an integer number (2996028).

Almost surely, 2^20472571 is an apocalyptic number.

20472571 is a deficient number, since it is larger than the sum of its proper divisors (3495653).

20472571 is an equidigital number, since it uses as much as digits as its factorization.

20472571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71381.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 20472571 is about 4524.6625288523. The cubic root of 20472571 is about 273.5630656671.

Adding to 20472571 its reverse (17527402), we get a palindrome (37999973).

The spelling of 20472571 in words is "twenty million, four hundred seventy-two thousand, five hundred seventy-one".