18953745 has 8 divisors (see below), whose sum is σ = 30326016. Its totient is φ = 10108656.

The previous prime is 18953743. The next prime is 18953783. The reversal of 18953745 is 54735981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18953745 - 2¹ = 18953743 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18953697 and 18953706.

It is not an unprimeable number, because it can be changed into a prime (18953743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631777 + ... + 631806.

It is an arithmetic number, because the mean of its divisors is an integer number (3790752).

Almost surely, 2^18953745 is an apocalyptic number.

18953745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18953745 is a deficient number, since it is larger than the sum of its proper divisors (11372271).

18953745 is a wasteful number, since it uses less digits than its factorization.

18953745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263591.

The product of its digits is 151200, while the sum is 42.

The square root of 18953745 is about 4353.5898980037. The cubic root of 18953745 is about 266.6234504620.

The spelling of 18953745 in words is "eighteen million, nine hundred fifty-three thousand, seven hundred forty-five".