18825490 has 16 divisors (see below), whose sum is σ = 33988248. Its totient is φ = 7507456.

The previous prime is 18825451. The next prime is 18825493. The reversal of 18825490 is 9452881.

It can be written as a sum of positive squares in 4 ways, for example, as 18429849 + 395641 = 4293^2 + 629^2 .

It is not an unprimeable number, because it can be changed into a prime (18825493) 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, 864 + ... + 6196.

Almost surely, 2^18825490 is an apocalyptic number.

18825490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18825490 is a deficient number, since it is larger than the sum of its proper divisors (15162758).

18825490 is a wasteful number, since it uses less digits than its factorization.

18825490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5693.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 18825490 is about 4338.8350971200. The cubic root of 18825490 is about 266.0206986362.

The spelling of 18825490 in words is "eighteen million, eight hundred twenty-five thousand, four hundred ninety".