18434772808 has 8 divisors (see below), whose sum is σ = 34565199030. Its totient is φ = 9217386400.

The previous prime is 18434772791. The next prime is 18434772827. The reversal of 18434772808 is 80827743481.

It can be written as a sum of positive squares in only one way, i.e., 18431320644 + 3452164 = 135762^2 + 1858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1152173293 + ... + 1152173308.

Almost surely, 2^18434772808 is an apocalyptic number.

It is an amenable number.

18434772808 is a deficient number, since it is larger than the sum of its proper divisors (16130426222).

18434772808 is a wasteful number, since it uses less digits than its factorization.

18434772808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304346607 (or 2304346603 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 52.

The spelling of 18434772808 in words is "eighteen billion, four hundred thirty-four million, seven hundred seventy-two thousand, eight hundred eight".