18445955 has 8 divisors (see below), whose sum is σ = 24147504. Its totient is φ = 13415200.

The previous prime is 18445951. The next prime is 18445957. The reversal of 18445955 is 55954481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18445955 - 2² = 18445951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18445951) 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, 167636 + ... + 167745.

It is an arithmetic number, because the mean of its divisors is an integer number (3018438).

Almost surely, 2^18445955 is an apocalyptic number.

18445955 is a deficient number, since it is larger than the sum of its proper divisors (5701549).

18445955 is a wasteful number, since it uses less digits than its factorization.

18445955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335397.

The product of its digits is 144000, while the sum is 41.

The square root of 18445955 is about 4294.8754347478. The cubic root of 18445955 is about 264.2208274389.

The spelling of 18445955 in words is "eighteen million, four hundred forty-five thousand, nine hundred fifty-five".