18529540 has 48 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 7089920.

The previous prime is 18529531. The next prime is 18529547. The reversal of 18529540 is 4592581.

18529540 = T₃₉₁ + T₃₉₂ + ... + T₅₅₄.

It is a super-2 number, since 2×18529540² = 686687705223200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18529496 and 18529505.

It is not an unprimeable number, because it can be changed into a prime (18529547) 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, 48189 + ... + 48571.

It is an arithmetic number, because the mean of its divisors is an integer number (846720).

Almost surely, 2^18529540 is an apocalyptic number.

18529540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18529540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20321280).

18529540 is an abundant number, since it is smaller than the sum of its proper divisors (22113020).

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

18529540 is a wasteful number, since it uses less digits than its factorization.

18529540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 18529540 is about 4304.5952190653. The cubic root of 18529540 is about 264.6193181194.

The spelling of 18529540 in words is "eighteen million, five hundred twenty-nine thousand, five hundred forty".