18889065 has 64 divisors (see below), whose sum is σ = 37094400. Its totient is φ = 9061632.

The previous prime is 18889051. The next prime is 18889081. The reversal of 18889065 is 56098881.

It is not a de Polignac number, because 18889065 - 2⁵ = 18889033 is a prime.

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 18889065.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82371 + ... + 82599.

It is an arithmetic number, because the mean of its divisors is an integer number (579600).

Almost surely, 2^18889065 is an apocalyptic number.

18889065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18889065 is a deficient number, since it is larger than the sum of its proper divisors (18205335).

18889065 is a wasteful number, since it uses less digits than its factorization.

18889065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 18889065 is about 4346.1551974130. The cubic root of 18889065 is about 266.3198190235.

It can be divided in two parts, 188 and 89065, that added together give a triangular number (89253 = T₄₂₂).

The spelling of 18889065 in words is "eighteen million, eight hundred eighty-nine thousand, sixty-five".