18924969418 has 12 divisors (see below), whose sum is σ = 29960167410. Its totient is φ = 8964458856.

The previous prime is 18924969407. The next prime is 18924969421. The reversal of 18924969418 is 81496942981.

It can be written as a sum of positive squares in only one way, i.e., 15313320009 + 3611649409 = 123747^2 + 60097^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13105213 + ... + 13106656.

Almost surely, 2^18924969418 is an apocalyptic number.

18924969418 is a deficient number, since it is larger than the sum of its proper divisors (11035197992).

18924969418 is a wasteful number, since it uses less digits than its factorization.

18924969418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26211909 (or 26211890 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 61.

The spelling of 18924969418 in words is "eighteen billion, nine hundred twenty-four million, nine hundred sixty-nine thousand, four hundred eighteen".