18140572 has 6 divisors (see below), whose sum is σ = 31746008. Its totient is φ = 9070284.

The previous prime is 18140569. The next prime is 18140587. The reversal of 18140572 is 27504181.

It is a self number, because there is not a number n which added to its sum of digits gives 18140572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2267568 + ... + 2267575.

Almost surely, 2^18140572 is an apocalyptic number.

It is an amenable number.

18140572 is a deficient number, since it is larger than the sum of its proper divisors (13605436).

18140572 is a wasteful number, since it uses less digits than its factorization.

18140572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4535147 (or 4535145 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18140572 is about 4259.1750374926. The cubic root of 18140572 is about 262.7545986389.

The spelling of 18140572 in words is "eighteen million, one hundred forty thousand, five hundred seventy-two".