18038249924 has 12 divisors (see below), whose sum is σ = 31637245500. Its totient is φ = 8999036928.

The previous prime is 18038249923. The next prime is 18038249939. The reversal of 18038249924 is 42994283081.

It can be written as a sum of positive squares in 2 ways, for example, as 9457562500 + 8580687424 = 97250^2 + 92632^2 .

It is not an unprimeable number, because it can be changed into a prime (18038249921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5019989 + ... + 5023580.

It is an arithmetic number, because the mean of its divisors is an integer number (2636437125).

Almost surely, 2^18038249924 is an apocalyptic number.

It is an amenable number.

18038249924 is a deficient number, since it is larger than the sum of its proper divisors (13598995576).

18038249924 is a wasteful number, since it uses less digits than its factorization.

18038249924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10044022 (or 10044020 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 18038249924 in words is "eighteen billion, thirty-eight million, two hundred forty-nine thousand, nine hundred twenty-four".