18795640 has 16 divisors (see below), whose sum is σ = 42290280. Its totient is φ = 7518240.

The previous prime is 18795631. The next prime is 18795649. The reversal of 18795640 is 4659781.

It is an interprime number because it is at equal distance from previous prime (18795631) and next prime (18795649).

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 469891 = 18795640 / (1 + 8 + 7 + 9 + 5 + 6 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 18795593 and 18795602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18795649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234906 + ... + 234985.

Almost surely, 2^18795640 is an apocalyptic number.

18795640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18795640 is an abundant number, since it is smaller than the sum of its proper divisors (23494640).

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

18795640 is a wasteful number, since it uses less digits than its factorization.

18795640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469902 (or 469898 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 18795640 is about 4335.3938690735. The cubic root of 18795640 is about 265.8800220228.

The spelling of 18795640 in words is "eighteen million, seven hundred ninety-five thousand, six hundred forty".