18749953 has 4 divisors (see below), whose sum is σ = 18759600. Its totient is φ = 18740308.

The previous prime is 18749933. The next prime is 18749959. The reversal of 18749953 is 35994781.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18749953 - 2¹³ = 18741761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18749959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775 + ... + 6172.

It is an arithmetic number, because the mean of its divisors is an integer number (4689900).

Almost surely, 2^18749953 is an apocalyptic number.

It is an amenable number.

18749953 is a deficient number, since it is larger than the sum of its proper divisors (9647).

18749953 is an equidigital number, since it uses as much as digits as its factorization.

18749953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9646.

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

The square root of 18749953 is about 4330.1215918263. The cubic root of 18749953 is about 265.6644203179.

The spelling of 18749953 in words is "eighteen million, seven hundred forty-nine thousand, nine hundred fifty-three".