18190456384 has 63 divisors (see below), whose sum is σ = 37785893313. Its totient is φ = 8687914752.

The previous prime is 18190456357. The next prime is 18190456397. The reversal of 18190456384 is 48365409181.

It is a happy number.

The square root of 18190456384 is 134872.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 17795560000 + 394896384 = 133400^2 + 19872^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24816082 + ... + 24816814.

Almost surely, 2^18190456384 is an apocalyptic number.

18190456384 is the 134872-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18190456384

18190456384 is an abundant number, since it is smaller than the sum of its proper divisors (19595436929).

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

18190456384 is an frugal number, since it uses more digits than its factorization.

18190456384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

Multiplying 18190456384 by its sum of digits (49), we get a square (891332362816 = 944104²).

The spelling of 18190456384 in words is "eighteen billion, one hundred ninety million, four hundred fifty-six thousand, three hundred eighty-four".