20361541 has 4 divisors (see below), whose sum is σ = 20434284. Its totient is φ = 20288800.

The previous prime is 20361533. The next prime is 20361547. The reversal of 20361541 is 14516302.

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 18096516 + 2265025 = 4254^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 20361541 - 2³ = 20361533 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 (20361547) 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, 35950 + ... + 36511.

It is an arithmetic number, because the mean of its divisors is an integer number (5108571).

Almost surely, 2^20361541 is an apocalyptic number.

It is an amenable number.

20361541 is a deficient number, since it is larger than the sum of its proper divisors (72743).

20361541 is an equidigital number, since it uses as much as digits as its factorization.

20361541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72742.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20361541 is about 4512.3764249007. The cubic root of 20361541 is about 273.0676258199.

Adding to 20361541 its reverse (14516302), we get a palindrome (34877843).

It can be divided in two parts, 20361 and 541, that added together give a palindrome (20902).

The spelling of 20361541 in words is "twenty million, three hundred sixty-one thousand, five hundred forty-one".