18949753 has 2 divisors, whose sum is σ = 18949754. Its totient is φ = 18949752.

The previous prime is 18949751. The next prime is 18949757. The reversal of 18949753 is 35794981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18593344 + 356409 = 4312^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 18949753 - 2¹ = 18949751 is a prime.

It is a super-2 number, since 2×18949753² = 718186277522018, which contains 22 as substring.

Together with 18949751, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18949751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474876 + 9474877.

It is an arithmetic number, because the mean of its divisors is an integer number (9474877).

Almost surely, 2^18949753 is an apocalyptic number.

It is an amenable number.

18949753 is a deficient number, since it is larger than the sum of its proper divisors (1).

18949753 is an equidigital number, since it uses as much as digits as its factorization.

18949753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 18949753 is about 4353.1314016464. The cubic root of 18949753 is about 266.6047305811.

The spelling of 18949753 in words is "eighteen million, nine hundred forty-nine thousand, seven hundred fifty-three".