20018625 has 64 divisors (see below), whose sum is σ = 38098944. Its totient is φ = 9240000.

The previous prime is 20018617. The next prime is 20018651. The reversal of 20018625 is 52681002.

It is not a de Polignac number, because 20018625 - 2³ = 20018617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20018595 and 20018604.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94770 + ... + 94980.

It is an arithmetic number, because the mean of its divisors is an integer number (595296).

Almost surely, 2^20018625 is an apocalyptic number.

20018625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20018625 is a deficient number, since it is larger than the sum of its proper divisors (18080319).

20018625 is a wasteful number, since it uses less digits than its factorization.

20018625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20018625 is about 4474.2178087348. The cubic root of 20018625 is about 271.5259955641.

Adding to 20018625 its reverse (52681002), we get a palindrome (72699627).

The spelling of 20018625 in words is "twenty million, eighteen thousand, six hundred twenty-five".