20542241149 has 4 divisors (see below), whose sum is σ = 20560089600. Its totient is φ = 20524392700.

The previous prime is 20542241143. The next prime is 20542241201. The reversal of 20542241149 is 94114224502.

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 20542241149 - 2⁹ = 20542240637 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 (20542241143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8922499 + ... + 8924800.

It is an arithmetic number, because the mean of its divisors is an integer number (5140022400).

Almost surely, 2^20542241149 is an apocalyptic number.

It is an amenable number.

20542241149 is a deficient number, since it is larger than the sum of its proper divisors (17848451).

20542241149 is a wasteful number, since it uses less digits than its factorization.

20542241149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17848450.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 20542241149 in words is "twenty billion, five hundred forty-two million, two hundred forty-one thousand, one hundred forty-nine".