18147522 has 16 divisors (see below), whose sum is σ = 36365472. Its totient is φ = 6037440.

The previous prime is 18147511. The next prime is 18147539. The reversal of 18147522 is 22574181.

It is a self number, because there is not a number n which added to its sum of digits gives 18147522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778 + ... + 6074.

It is an arithmetic number, because the mean of its divisors is an integer number (2272842).

Almost surely, 2^18147522 is an apocalyptic number.

18147522 is an abundant number, since it is smaller than the sum of its proper divisors (18217950).

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

18147522 is a wasteful number, since it uses less digits than its factorization.

18147522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5873.

The product of its digits is 4480, while the sum is 30.

The square root of 18147522 is about 4259.9908450606. The cubic root of 18147522 is about 262.7881497915.

The spelling of 18147522 in words is "eighteen million, one hundred forty-seven thousand, five hundred twenty-two".