18750437 has 2 divisors, whose sum is σ = 18750438. Its totient is φ = 18750436.

The previous prime is 18750421. The next prime is 18750467. The reversal of 18750437 is 73405781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14145121 + 4605316 = 3761^2 + 2146^2 .

It is a cyclic number.

It is not a de Polignac number, because 18750437 - 2⁴ = 18750421 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18750397 and 18750406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18750467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9375218 + 9375219.

It is an arithmetic number, because the mean of its divisors is an integer number (9375219).

Almost surely, 2^18750437 is an apocalyptic number.

It is an amenable number.

18750437 is a deficient number, since it is larger than the sum of its proper divisors (1).

18750437 is an equidigital number, since it uses as much as digits as its factorization.

18750437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 18750437 is about 4330.1774790417. The cubic root of 18750437 is about 265.6667061987. Note that the first 3 decimals are identical.

The spelling of 18750437 in words is "eighteen million, seven hundred fifty thousand, four hundred thirty-seven".