18694949152 has 96 divisors (see below), whose sum is σ = 41581137024. Its totient is φ = 8267339520.

The previous prime is 18694949149. The next prime is 18694949159. The reversal of 18694949152 is 25194949681.

It is a super-2 number, since 2×18694949152² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18694949159) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1569973 + ... + 1581835.

It is an arithmetic number, because the mean of its divisors is an integer number (433136844).

Almost surely, 2^18694949152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18694949152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20790568512).

18694949152 is an abundant number, since it is smaller than the sum of its proper divisors (22886187872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18694949152 is a wasteful number, since it uses less digits than its factorization.

18694949152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11943 (or 11913 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 58.

The spelling of 18694949152 in words is "eighteen billion, six hundred ninety-four million, nine hundred forty-nine thousand, one hundred fifty-two".