18015451899364 has 6 divisors (see below), whose sum is σ = 31527040823894. Its totient is φ = 9007725949680.

The previous prime is 18015451899329. The next prime is 18015451899397. The reversal of 18015451899364 is 46399815451081.

It can be written as a sum of positive squares in only one way, i.e., 17970884467264 + 44567432100 = 4239208^2 + 211110^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18015451899296 and 18015451899305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2251931487417 + ... + 2251931487424.

Almost surely, 2^{18015451899364} is an apocalyptic number.

It is an amenable number.

18015451899364 is a deficient number, since it is larger than the sum of its proper divisors (13511588924530).

18015451899364 is a wasteful number, since it uses less digits than its factorization.

18015451899364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503862974845 (or 4503862974843 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 64.

The spelling of 18015451899364 in words is "eighteen trillion, fifteen billion, four hundred fifty-one million, eight hundred ninety-nine thousand, three hundred sixty-four".