18752565 has 16 divisors (see below), whose sum is σ = 32312448. Its totient is φ = 9231936.

The previous prime is 18752561. The next prime is 18752579. The reversal of 18752565 is 56525781.

It is not a de Polignac number, because 18752565 - 2² = 18752561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18752561) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 47889 + ... + 48278.

It is an arithmetic number, because the mean of its divisors is an integer number (2019528).

Almost surely, 2^18752565 is an apocalyptic number.

18752565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18752565 is a deficient number, since it is larger than the sum of its proper divisors (13559883).

18752565 is a wasteful number, since it uses less digits than its factorization.

18752565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96188.

The product of its digits is 84000, while the sum is 39.

The square root of 18752565 is about 4330.4231894816. The cubic root of 18752565 is about 265.6767560510.

The spelling of 18752565 in words is "eighteen million, seven hundred fifty-two thousand, five hundred sixty-five".