20018924 has 24 divisors (see below), whose sum is σ = 37550688. Its totient is φ = 9313920.

The previous prime is 20018923. The next prime is 20018941. The reversal of 20018924 is 42981002.

It is a junction number, because it is equal to n+sod(n) for n = 20018893 and 20018902.

It is not an unprimeable number, because it can be changed into a prime (20018923) 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, 464 + ... + 6344.

It is an arithmetic number, because the mean of its divisors is an integer number (1564612).

Almost surely, 2^20018924 is an apocalyptic number.

It is an amenable number.

20018924 is a deficient number, since it is larger than the sum of its proper divisors (17531764).

20018924 is a wasteful number, since it uses less digits than its factorization.

20018924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945 (or 5943 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20018924 is about 4474.2512222717. The cubic root of 20018924 is about 271.5273474030.

Adding to 20018924 its reverse (42981002), we get a palindrome (62999926).

The spelling of 20018924 in words is "twenty million, eighteen thousand, nine hundred twenty-four".