20432413 has 4 divisors (see below), whose sum is σ = 20482780. Its totient is φ = 20382048.

The previous prime is 20432407. The next prime is 20432437. The reversal of 20432413 is 31423402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12581209 + 7851204 = 3547^2 + 2802^2 .

It is a cyclic number.

It is not a de Polignac number, because 20432413 - 2⁵ = 20432381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24570 + ... + 25387.

It is an arithmetic number, because the mean of its divisors is an integer number (5120695).

Almost surely, 2^20432413 is an apocalyptic number.

It is an amenable number.

20432413 is a deficient number, since it is larger than the sum of its proper divisors (50367).

20432413 is an equidigital number, since it uses as much as digits as its factorization.

20432413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50366.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20432413 is about 4520.2226715063. Note that the first 3 decimals coincide. The cubic root of 20432413 is about 273.3840792489.

Adding to 20432413 its reverse (31423402), we get a palindrome (51855815).

The spelling of 20432413 in words is "twenty million, four hundred thirty-two thousand, four hundred thirteen".