20115544541 has 4 divisors (see below), whose sum is σ = 20118944352. Its totient is φ = 20112144732.

The previous prime is 20115544531. The next prime is 20115544571. The reversal of 20115544541 is 14544551102.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 20115544541 - 2¹⁴ = 20115528157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20115544498 and 20115544507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115544531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691015 + ... + 1702868.

It is an arithmetic number, because the mean of its divisors is an integer number (5029736088).

Almost surely, 2^20115544541 is an apocalyptic number.

It is an amenable number.

20115544541 is a deficient number, since it is larger than the sum of its proper divisors (3399811).

20115544541 is an equidigital number, since it uses as much as digits as its factorization.

20115544541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399810.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 20115544541 in words is "twenty billion, one hundred fifteen million, five hundred forty-four thousand, five hundred forty-one".