20413541 has 4 divisors (see below), whose sum is σ = 20458284. Its totient is φ = 20368800.

The previous prime is 20413537. The next prime is 20413559. The reversal of 20413541 is 14531402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14531402 = 2 ⋅7265701.

It can be written as a sum of positive squares in 2 ways, for example, as 5428900 + 14984641 = 2330^2 + 3871^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413541 - 2² = 20413537 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 (20413511) 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, 21680 + ... + 22601.

It is an arithmetic number, because the mean of its divisors is an integer number (5114571).

Almost surely, 2^20413541 is an apocalyptic number.

It is an amenable number.

20413541 is a deficient number, since it is larger than the sum of its proper divisors (44743).

20413541 is an equidigital number, since it uses as much as digits as its factorization.

20413541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44742.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20413541 is about 4518.1346814808. The cubic root of 20413541 is about 273.2998846967.

Adding to 20413541 its reverse (14531402), we get a palindrome (34944943).

The spelling of 20413541 in words is "twenty million, four hundred thirteen thousand, five hundred forty-one".