18955425 has 24 divisors (see below), whose sum is σ = 33185376. Its totient is φ = 9514240.

The previous prime is 18955403. The next prime is 18955451. The reversal of 18955425 is 52455981.

It is not a de Polignac number, because 18955425 - 2⁷ = 18955297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6159 + ... + 8708.

It is an arithmetic number, because the mean of its divisors is an integer number (1382724).

Almost surely, 2^18955425 is an apocalyptic number.

18955425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18955425 is a deficient number, since it is larger than the sum of its proper divisors (14229951).

18955425 is a wasteful number, since it uses less digits than its factorization.

18955425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14897 (or 14892 counting only the distinct ones).

The product of its digits is 72000, while the sum is 39.

The square root of 18955425 is about 4353.7828379468. The cubic root of 18955425 is about 266.6313277823.

The spelling of 18955425 in words is "eighteen million, nine hundred fifty-five thousand, four hundred twenty-five".