18169140 has 48 divisors (see below), whose sum is σ = 55500480. Its totient is φ = 4404480.

The previous prime is 18169133. The next prime is 18169147. The reversal of 18169140 is 4196181.

It is an interprime number because it is at equal distance from previous prime (18169133) and next prime (18169147).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18169098 and 18169107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18169147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13105 + ... + 14424.

It is an arithmetic number, because the mean of its divisors is an integer number (1156260).

Almost surely, 2^18169140 is an apocalyptic number.

18169140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18169140 is an abundant number, since it is smaller than the sum of its proper divisors (37331340).

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

18169140 is a wasteful number, since it uses less digits than its factorization.

18169140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27552 (or 27550 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 18169140 is about 4262.5274192666. The cubic root of 18169140 is about 262.8924560420.

The spelling of 18169140 in words is "eighteen million, one hundred sixty-nine thousand, one hundred forty".