18948253 has 2 divisors, whose sum is σ = 18948254. Its totient is φ = 18948252.

The previous prime is 18948221. The next prime is 18948277. The reversal of 18948253 is 35284981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 3250809 = 3962^2 + 1803^2 .

It is a cyclic number.

It is not a de Polignac number, because 18948253 - 2⁵ = 18948221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18948283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474126 + 9474127.

It is an arithmetic number, because the mean of its divisors is an integer number (9474127).

Almost surely, 2^18948253 is an apocalyptic number.

It is an amenable number.

18948253 is a deficient number, since it is larger than the sum of its proper divisors (1).

18948253 is an equidigital number, since it uses as much as digits as its factorization.

18948253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 18948253 is about 4352.9591084686. The cubic root of 18948253 is about 266.5976958782.

The spelling of 18948253 in words is "eighteen million, nine hundred forty-eight thousand, two hundred fifty-three".