1834020857 has 2 divisors, whose sum is σ = 1834020858. Its totient is φ = 1834020856.

The previous prime is 1834020833. The next prime is 1834020893. The reversal of 1834020857 is 7580204381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1582766656 + 251254201 = 39784^2 + 15851^2 .

It is a cyclic number.

It is not a de Polignac number, because 1834020857 - 2¹⁰ = 1834019833 is a prime.

It is a super-2 number, since 2×1834020857² = 6727265007822028898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1834020857.

It is not a weakly prime, because it can be changed into another prime (1834020827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917010428 + 917010429.

It is an arithmetic number, because the mean of its divisors is an integer number (917010429).

Almost surely, 2^1834020857 is an apocalyptic number.

It is an amenable number.

1834020857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1834020857 is an equidigital number, since it uses as much as digits as its factorization.

1834020857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1834020857 is about 42825.4697230515. The cubic root of 1834020857 is about 1224.0563844136.

The spelling of 1834020857 in words is "one billion, eight hundred thirty-four million, twenty thousand, eight hundred fifty-seven".