1820506141 has 2 divisors, whose sum is σ = 1820506142. Its totient is φ = 1820506140.

The previous prime is 1820506139. The next prime is 1820506157. The reversal of 1820506141 is 1416050281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1785400516 + 35105625 = 42254^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820506141 - 2¹ = 1820506139 is a prime.

Together with 1820506139, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1820506841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910253070 + 910253071.

It is an arithmetic number, because the mean of its divisors is an integer number (910253071).

Almost surely, 2^1820506141 is an apocalyptic number.

It is an amenable number.

1820506141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820506141 is an equidigital number, since it uses as much as digits as its factorization.

1820506141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1820506141 is about 42667.3896670513. The cubic root of 1820506141 is about 1221.0423191652.

It can be divided in two parts, 182050 and 6141, that added together give a triangular number (188191 = T₆₁₃).

The spelling of 1820506141 in words is "one billion, eight hundred twenty million, five hundred six thousand, one hundred forty-one".