20023745 has 8 divisors (see below), whose sum is σ = 27461184. Its totient is φ = 13730544.

The previous prime is 20023741. The next prime is 20023747. The reversal of 20023745 is 54732002.

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 20023745 - 2² = 20023741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20023745.

It is not an unprimeable number, because it can be changed into a prime (20023741) 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, 286019 + ... + 286088.

It is an arithmetic number, because the mean of its divisors is an integer number (3432648).

Almost surely, 2^20023745 is an apocalyptic number.

It is an amenable number.

20023745 is a deficient number, since it is larger than the sum of its proper divisors (7437439).

20023745 is an equidigital number, since it uses as much as digits as its factorization.

20023745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572119.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20023745 is about 4474.7899392039. The cubic root of 20023745 is about 271.5491422520.

Adding to 20023745 its reverse (54732002), we get a palindrome (74755747).

The spelling of 20023745 in words is "twenty million, twenty-three thousand, seven hundred forty-five".