18366461574 has 36 divisors (see below), whose sum is σ = 37386193572. Its totient is φ = 6015151440.

The previous prime is 18366461521. The next prime is 18366461579. The reversal of 18366461574 is 47516466381.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366461579) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20249229 + ... + 20250135.

It is an arithmetic number, because the mean of its divisors is an integer number (1038505377).

Almost surely, 2^18366461574 is an apocalyptic number.

18366461574 is an abundant number, since it is smaller than the sum of its proper divisors (19019731998).

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

18366461574 is an frugal number, since it uses more digits than its factorization.

18366461574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941 (or 973 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The spelling of 18366461574 in words is "eighteen billion, three hundred sixty-six million, four hundred sixty-one thousand, five hundred seventy-four".