18124745869 has 2 divisors, whose sum is σ = 18124745870. Its totient is φ = 18124745868.

The previous prime is 18124745803. The next prime is 18124745879. The reversal of 18124745869 is 96854742181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13050320644 + 5074425225 = 114238^2 + 71235^2 .

It is a cyclic number.

It is not a de Polignac number, because 18124745869 - 2¹³ = 18124737677 is a prime.

It is a super-2 number, since 2×18124745869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18124745879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062372934 + 9062372935.

It is an arithmetic number, because the mean of its divisors is an integer number (9062372935).

Almost surely, 2^18124745869 is an apocalyptic number.

It is an amenable number.

18124745869 is a deficient number, since it is larger than the sum of its proper divisors (1).

18124745869 is an equidigital number, since it uses as much as digits as its factorization.

18124745869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The spelling of 18124745869 in words is "eighteen billion, one hundred twenty-four million, seven hundred forty-five thousand, eight hundred sixty-nine".