1821948241 has 2 divisors, whose sum is σ = 1821948242. Its totient is φ = 1821948240.

The previous prime is 1821948181. The next prime is 1821948263. The reversal of 1821948241 is 1428491281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1671174400 + 150773841 = 40880^2 + 12279^2 .

It is a cyclic number.

It is not a de Polignac number, because 1821948241 - 2¹³ = 1821940049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1821948194 and 1821948203.

It is not a weakly prime, because it can be changed into another prime (1821948641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910974120 + 910974121.

It is an arithmetic number, because the mean of its divisors is an integer number (910974121).

Almost surely, 2^1821948241 is an apocalyptic number.

It is an amenable number.

1821948241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821948241 is an equidigital number, since it uses as much as digits as its factorization.

1821948241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 40.

The square root of 1821948241 is about 42684.2856447194. The cubic root of 1821948241 is about 1221.3646471782.

The spelling of 1821948241 in words is "one billion, eight hundred twenty-one million, nine hundred forty-eight thousand, two hundred forty-one".