18823745 has 16 divisors (see below), whose sum is σ = 23188032. Its totient is φ = 14664000.

The previous prime is 18823741. The next prime is 18823747. The reversal of 18823745 is 54732881.

It is not a de Polignac number, because 18823745 - 2² = 18823741 is a prime.

It is a super-3 number, since 3×18823745³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18823699 and 18823708.

It is not an unprimeable number, because it can be changed into a prime (18823741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66374 + ... + 66656.

It is an arithmetic number, because the mean of its divisors is an integer number (1449252).

Almost surely, 2^18823745 is an apocalyptic number.

It is an amenable number.

18823745 is a deficient number, since it is larger than the sum of its proper divisors (4364287).

18823745 is a wasteful number, since it uses less digits than its factorization.

18823745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its digits is 53760, while the sum is 38.

The square root of 18823745 is about 4338.6340016185. The cubic root of 18823745 is about 266.0124789216.

The spelling of 18823745 in words is "eighteen million, eight hundred twenty-three thousand, seven hundred forty-five".