18196530 has 64 divisors (see below), whose sum is σ = 48411648. Its totient is φ = 4340160.

The previous prime is 18196523. The next prime is 18196531. The reversal of 18196530 is 3569181.

It is a super-2 number, since 2×18196530² = 662227408081800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 18196491 and 18196500.

It is not an unprimeable number, because it can be changed into a prime (18196531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21699 + ... + 22521.

It is an arithmetic number, because the mean of its divisors is an integer number (756432).

Almost surely, 2^18196530 is an apocalyptic number.

18196530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18196530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24205824).

18196530 is an abundant number, since it is smaller than the sum of its proper divisors (30215118).

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

18196530 is a wasteful number, since it uses less digits than its factorization.

18196530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 18196530 is about 4265.7390918808. The cubic root of 18196530 is about 263.0244932780.

The spelling of 18196530 in words is "eighteen million, one hundred ninety-six thousand, five hundred thirty".