18825961837 has 2 divisors, whose sum is σ = 18825961838. Its totient is φ = 18825961836.

The previous prime is 18825961801. The next prime is 18825961849. The reversal of 18825961837 is 73816952881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12882477001 + 5943484836 = 113501^2 + 77094^2 .

It is a cyclic number.

It is not a de Polignac number, because 18825961837 - 2¹⁵ = 18825929069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18825961867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9412980918 + 9412980919.

It is an arithmetic number, because the mean of its divisors is an integer number (9412980919).

Almost surely, 2^18825961837 is an apocalyptic number.

It is an amenable number.

18825961837 is a deficient number, since it is larger than the sum of its proper divisors (1).

18825961837 is an equidigital number, since it uses as much as digits as its factorization.

18825961837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 58.

The spelling of 18825961837 in words is "eighteen billion, eight hundred twenty-five million, nine hundred sixty-one thousand, eight hundred thirty-seven".