20366421541 has 4 divisors (see below), whose sum is σ = 20366898912. Its totient is φ = 20365944172.

The previous prime is 20366421529. The next prime is 20366421553. The reversal of 20366421541 is 14512466302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20366421529) and next prime (20366421553).

It is a cyclic number.

It is not a de Polignac number, because 20366421541 - 2²¹ = 20364324389 is a prime.

It is a super-2 number, since 2×20366421541² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20366421497 and 20366421506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20366421241) 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, 167641 + ... + 262366.

It is an arithmetic number, because the mean of its divisors is an integer number (5091724728).

Almost surely, 2^20366421541 is an apocalyptic number.

It is an amenable number.

20366421541 is a deficient number, since it is larger than the sum of its proper divisors (477371).

20366421541 is an equidigital number, since it uses as much as digits as its factorization.

20366421541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477370.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20366421541 its reverse (14512466302), we get a palindrome (34878887843).

The spelling of 20366421541 in words is "twenty billion, three hundred sixty-six million, four hundred twenty-one thousand, five hundred forty-one".