18750503 has 2 divisors, whose sum is σ = 18750504. Its totient is φ = 18750502.

The previous prime is 18750493. The next prime is 18750533. The reversal of 18750503 is 30505781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18750503 - 2²⁴ = 1973287 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18750533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9375251 + 9375252.

It is an arithmetic number, because the mean of its divisors is an integer number (9375252).

Almost surely, 2^18750503 is an apocalyptic number.

18750503 is a deficient number, since it is larger than the sum of its proper divisors (1).

18750503 is an equidigital number, since it uses as much as digits as its factorization.

18750503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 18750503 is about 4330.1850999697. The cubic root of 18750503 is about 265.6670179067.

The spelling of 18750503 in words is "eighteen million, seven hundred fifty thousand, five hundred three".