18881454608 has 20 divisors (see below), whose sum is σ = 37571544300. Its totient is φ = 9185572224.

The previous prime is 18881454601. The next prime is 18881454629. The reversal of 18881454608 is 80645418881.

It can be written as a sum of positive squares in 2 ways, for example, as 16705045504 + 2176409104 = 129248^2 + 46652^2 .

It is a super-2 number, since 2×18881454608² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18881454608.

It is not an unprimeable number, because it can be changed into a prime (18881454601) 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, 15946583 + ... + 15947766.

It is an arithmetic number, because the mean of its divisors is an integer number (1878577215).

Almost surely, 2^18881454608 is an apocalyptic number.

It is an amenable number.

18881454608 is a deficient number, since it is larger than the sum of its proper divisors (18690089692).

18881454608 is a wasteful number, since it uses less digits than its factorization.

18881454608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31894394 (or 31894388 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 53.

The spelling of 18881454608 in words is "eighteen billion, eight hundred eighty-one million, four hundred fifty-four thousand, six hundred eight".