20472413 has 8 divisors (see below), whose sum is σ = 22117368. Its totient is φ = 18837504.

The previous prime is 20472379. The next prime is 20472421. The reversal of 20472413 is 31427402.

It can be written as a sum of positive squares in 4 ways, for example, as 2647129 + 17825284 = 1627^2 + 4222^2 .

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 20472413 - 2⁶ = 20472349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472013) 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, 2045 + ... + 6717.

It is an arithmetic number, because the mean of its divisors is an integer number (2764671).

Almost surely, 2^20472413 is an apocalyptic number.

It is an amenable number.

20472413 is a deficient number, since it is larger than the sum of its proper divisors (1644955).

20472413 is a wasteful number, since it uses less digits than its factorization.

20472413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20472413 is about 4524.6450689529. The cubic root of 20472413 is about 273.5623619112.

Adding to 20472413 its reverse (31427402), we get a palindrome (51899815).

The spelling of 20472413 in words is "twenty million, four hundred seventy-two thousand, four hundred thirteen".