18820900937 has 2 divisors, whose sum is σ = 18820900938. Its totient is φ = 18820900936.

The previous prime is 18820900913. The next prime is 18820900993. The reversal of 18820900937 is 73900902881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17543267401 + 1277633536 = 132451^2 + 35744^2 .

It is a cyclic number.

It is not a de Polignac number, because 18820900937 - 2¹² = 18820896841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18820900891 and 18820900900.

It is not a weakly prime, because it can be changed into another prime (18820900337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9410450468 + 9410450469.

It is an arithmetic number, because the mean of its divisors is an integer number (9410450469).

Almost surely, 2^18820900937 is an apocalyptic number.

It is an amenable number.

18820900937 is a deficient number, since it is larger than the sum of its proper divisors (1).

18820900937 is an equidigital number, since it uses as much as digits as its factorization.

18820900937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 18820900937 in words is "eighteen billion, eight hundred twenty million, nine hundred thousand, nine hundred thirty-seven".