18240386574 has 16 divisors (see below), whose sum is σ = 38400814080. Its totient is φ = 5760122040.

The previous prime is 18240386573. The next prime is 18240386597. The reversal of 18240386574 is 47568304281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240386573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80001582 + ... + 80001809.

It is an arithmetic number, because the mean of its divisors is an integer number (2400050880).

Almost surely, 2^18240386574 is an apocalyptic number.

18240386574 is an abundant number, since it is smaller than the sum of its proper divisors (20160427506).

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

18240386574 is a wasteful number, since it uses less digits than its factorization.

18240386574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160003415.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 18240386574 in words is "eighteen billion, two hundred forty million, three hundred eighty-six thousand, five hundred seventy-four".