20248988549 has 4 divisors (see below), whose sum is σ = 20902181760. Its totient is φ = 19595795340.

The previous prime is 20248988537. The next prime is 20248988563. The reversal of 20248988549 is 94588984202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94588984202 = 2 ⋅47294492101.

It is a cyclic number.

It is not a de Polignac number, because 20248988549 - 2⁸ = 20248988293 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 (20248988519) 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, 326596559 + ... + 326596620.

It is an arithmetic number, because the mean of its divisors is an integer number (5225545440).

Almost surely, 2^20248988549 is an apocalyptic number.

It is an amenable number.

20248988549 is a deficient number, since it is larger than the sum of its proper divisors (653193211).

20248988549 is an equidigital number, since it uses as much as digits as its factorization.

20248988549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653193210.

The product of its (nonzero) digits is 13271040, while the sum is 59.

The spelling of 20248988549 in words is "twenty billion, two hundred forty-eight million, nine hundred eighty-eight thousand, five hundred forty-nine".