18927965 has 24 divisors (see below), whose sum is σ = 27578880. Its totient is φ = 12411168.

The previous prime is 18927913. The next prime is 18927973. The reversal of 18927965 is 56972981.

It is not a de Polignac number, because 18927965 - 2¹⁶ = 18862429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3956 + ... + 7314.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^18927965 is an apocalyptic number.

It is an amenable number.

18927965 is a deficient number, since it is larger than the sum of its proper divisors (8650915).

18927965 is a wasteful number, since it uses less digits than its factorization.

18927965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401 (or 3394 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The square root of 18927965 is about 4350.6281155714. The cubic root of 18927965 is about 266.5025126865.

The spelling of 18927965 in words is "eighteen million, nine hundred twenty-seven thousand, nine hundred sixty-five".