20445121143541 has 8 divisors (see below), whose sum is σ = 20466327798144. Its totient is φ = 20423915320080.

The previous prime is 20445121143493. The next prime is 20445121143613. The reversal of 20445121143541 is 14534112154402.

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 20445121143541 - 2¹⁵ = 20445121110773 is a prime.

It is a super-3 number, since 3×20445121143541³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20445121143541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445121143841) 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, 57220255 + ... + 57576451.

It is an arithmetic number, because the mean of its divisors is an integer number (2558290974768).

Almost surely, 2^{20445121143541} is an apocalyptic number.

It is an amenable number.

20445121143541 is a deficient number, since it is larger than the sum of its proper divisors (21206654603).

20445121143541 is an equidigital number, since it uses as much as digits as its factorization.

20445121143541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415571.

The product of its (nonzero) digits is 76800, while the sum is 37.

Adding to 20445121143541 its reverse (14534112154402), we get a palindrome (34979233297943).

The spelling of 20445121143541 in words is "twenty trillion, four hundred forty-five billion, one hundred twenty-one million, one hundred forty-three thousand, five hundred forty-one".