2720021549 has 8 divisors (see below), whose sum is σ = 3184415808. Its totient is φ = 2274582240.

The previous prime is 2720021543. The next prime is 2720021581. The reversal of 2720021549 is 9451200272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2720021549 - 2²⁴ = 2703244333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720021543) 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, 4738427 + ... + 4739000.

It is an arithmetic number, because the mean of its divisors is an integer number (398051976).

Almost surely, 2^2720021549 is an apocalyptic number.

It is an amenable number.

2720021549 is a deficient number, since it is larger than the sum of its proper divisors (464394259).

2720021549 is an equidigital number, since it uses as much as digits as its factorization.

2720021549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9477475.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2720021549 is about 52153.8258328188. The cubic root of 2720021549 is about 1395.9100956940.

The spelling of 2720021549 in words is "two billion, seven hundred twenty million, twenty-one thousand, five hundred forty-nine".