20183745 has 8 divisors (see below), whose sum is σ = 32294016. Its totient is φ = 10764656.

The previous prime is 20183711. The next prime is 20183749. The reversal of 20183745 is 54738102.

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

It is a cyclic number.

It is not a de Polignac number, because 20183745 - 2⁷ = 20183617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20183749) 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, 672777 + ... + 672806.

It is an arithmetic number, because the mean of its divisors is an integer number (4036752).

Almost surely, 2^20183745 is an apocalyptic number.

It is an amenable number.

20183745 is a deficient number, since it is larger than the sum of its proper divisors (12110271).

20183745 is a wasteful number, since it uses less digits than its factorization.

20183745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345591.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20183745 is about 4492.6323018916. The cubic root of 20183745 is about 272.2704966604.

The spelling of 20183745 in words is "twenty million, one hundred eighty-three thousand, seven hundred forty-five".