18016229572 has 12 divisors (see below), whose sum is σ = 34394620176. Its totient is φ = 8189195240.

The previous prime is 18016229513. The next prime is 18016229597. The reversal of 18016229572 is 27592261081.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204729838 + ... + 204729925.

It is an arithmetic number, because the mean of its divisors is an integer number (2866218348).

Almost surely, 2^18016229572 is an apocalyptic number.

It is an amenable number.

18016229572 is a deficient number, since it is larger than the sum of its proper divisors (16378390604).

18016229572 is a wasteful number, since it uses less digits than its factorization.

18016229572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409459778 (or 409459776 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 18016229572 in words is "eighteen billion, sixteen million, two hundred twenty-nine thousand, five hundred seventy-two".