2019248681 has 6 divisors (see below), whose sum is σ = 2038308090. Its totient is φ = 2000365856.

The previous prime is 2019248677. The next prime is 2019248711. The reversal of 2019248681 is 1868429102.

It can be written as a sum of positive squares in only one way, i.e., 1121647081 + 897601600 = 33491^2 + 29960^2 .

It is not a de Polignac number, because 2019248681 - 2² = 2019248677 is a prime.

It is a super-2 number, since 2×2019248681² = 8154730471440479522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019248281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76736 + ... + 99633.

It is an arithmetic number, because the mean of its divisors is an integer number (339718015).

Almost surely, 2^2019248681 is an apocalyptic number.

It is an amenable number.

2019248681 is a deficient number, since it is larger than the sum of its proper divisors (19059409).

2019248681 is an equidigital number, since it uses as much as digits as its factorization.

2019248681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176583 (or 176476 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 2019248681 is about 44936.0510169730. The cubic root of 2019248681 is about 1263.9501214178.

The spelling of 2019248681 in words is "two billion, nineteen million, two hundred forty-eight thousand, six hundred eighty-one".