18465983476 has 6 divisors (see below), whose sum is σ = 32315471090. Its totient is φ = 9232991736.

The previous prime is 18465983449. The next prime is 18465983509. The reversal of 18465983476 is 67438956481.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18394411876 + 71571600 = 135626^2 + 8460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2308247931 + ... + 2308247938.

Almost surely, 2^18465983476 is an apocalyptic number.

It is an amenable number.

18465983476 is a deficient number, since it is larger than the sum of its proper divisors (13849487614).

18465983476 is a wasteful number, since it uses less digits than its factorization.

18465983476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616495873 (or 4616495871 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 61.

The spelling of 18465983476 in words is "eighteen billion, four hundred sixty-five million, nine hundred eighty-three thousand, four hundred seventy-six".