18882945 has 24 divisors (see below), whose sum is σ = 33224256. Its totient is φ = 9919008.

The previous prime is 18882923. The next prime is 18882949. The reversal of 18882945 is 54928881.

It is a happy number.

It is not a de Polignac number, because 18882945 - 2⁹ = 18882433 is a prime.

It is a super-2 number, since 2×18882945² = 713131223746050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18882945.

It is not an unprimeable number, because it can be changed into a prime (18882949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117 + ... + 6146.

It is an arithmetic number, because the mean of its divisors is an integer number (1384344).

Almost surely, 2^18882945 is an apocalyptic number.

18882945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18882945 is a deficient number, since it is larger than the sum of its proper divisors (14341311).

18882945 is a wasteful number, since it uses less digits than its factorization.

18882945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6341 (or 6338 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 18882945 is about 4345.4510697970. The cubic root of 18882945 is about 266.2910536444.

The spelling of 18882945 in words is "eighteen million, eight hundred eighty-two thousand, nine hundred forty-five".