18881064 has 24 divisors (see below), whose sum is σ = 51136410. Its totient is φ = 6293664.

The previous prime is 18881039. The next prime is 18881081. The reversal of 18881064 is 46018881.

It can be written as a sum of positive squares in only one way, i.e., 13264164 + 5616900 = 3642^2 + 2370^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 131047 + ... + 131190.

Almost surely, 2^18881064 is an apocalyptic number.

It is an amenable number.

18881064 is an abundant number, since it is smaller than the sum of its proper divisors (32255346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18881064 is a wasteful number, since it uses less digits than its factorization.

18881064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262249 (or 262242 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 18881064 is about 4345.2346311793. The cubic root of 18881064 is about 266.2822112718.

The spelling of 18881064 in words is "eighteen million, eight hundred eighty-one thousand, sixty-four".