18954037 has 2 divisors, whose sum is σ = 18954038. Its totient is φ = 18954036.

The previous prime is 18954029. The next prime is 18954041. The reversal of 18954037 is 73045981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17901361 + 1052676 = 4231^2 + 1026^2 .

It is an emirp because it is prime and its reverse (73045981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18954037 - 2³ = 18954029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18953987 and 18954005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18954017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9477018 + 9477019.

It is an arithmetic number, because the mean of its divisors is an integer number (9477019).

Almost surely, 2^18954037 is an apocalyptic number.

It is an amenable number.

18954037 is a deficient number, since it is larger than the sum of its proper divisors (1).

18954037 is an equidigital number, since it uses as much as digits as its factorization.

18954037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 18954037 is about 4353.6234334173. The cubic root of 18954037 is about 266.6248196487.

The spelling of 18954037 in words is "eighteen million, nine hundred fifty-four thousand, thirty-seven".