18954725 has 6 divisors (see below), whose sum is σ = 23503890. Its totient is φ = 15163760.

The previous prime is 18954721. The next prime is 18954739. The reversal of 18954725 is 52745981.

It can be written as a sum of positive squares in 3 ways, for example, as 101761 + 18852964 = 319^2 + 4342^2 .

It is not a de Polignac number, because 18954725 - 2² = 18954721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18954721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379070 + ... + 379119.

It is an arithmetic number, because the mean of its divisors is an integer number (3917315).

Almost surely, 2^18954725 is an apocalyptic number.

It is an amenable number.

18954725 is a deficient number, since it is larger than the sum of its proper divisors (4549165).

18954725 is an equidigital number, since it uses as much as digits as its factorization.

18954725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758199 (or 758194 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 18954725 is about 4353.7024473430. The cubic root of 18954725 is about 266.6280456221.

The spelling of 18954725 in words is "eighteen million, nine hundred fifty-four thousand, seven hundred twenty-five".