18889953 has 4 divisors (see below), whose sum is σ = 25186608. Its totient is φ = 12593300.

The previous prime is 18889921. The next prime is 18889957. The reversal of 18889953 is 35998881.

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.

It is a cyclic number.

It is not a de Polignac number, because 18889953 - 2⁵ = 18889921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18889896 and 18889905.

It is not an unprimeable number, because it can be changed into a prime (18889957) 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, 3148323 + ... + 3148328.

It is an arithmetic number, because the mean of its divisors is an integer number (6296652).

Almost surely, 2^18889953 is an apocalyptic number.

It is an amenable number.

18889953 is a deficient number, since it is larger than the sum of its proper divisors (6296655).

18889953 is an equidigital number, since it uses as much as digits as its factorization.

18889953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6296654.

The product of its digits is 622080, while the sum is 51.

The square root of 18889953 is about 4346.2573554726. The cubic root of 18889953 is about 266.3239923075.

The spelling of 18889953 in words is "eighteen million, eight hundred eighty-nine thousand, nine hundred fifty-three".