18500016852 has 18 divisors (see below), whose sum is σ = 46763931578. Its totient is φ = 6166672272.

The previous prime is 18500016851. The next prime is 18500016853. The reversal of 18500016852 is 25861000581.

It is an interprime number because it is at equal distance from previous prime (18500016851) and next prime (18500016853).

It can be written as a sum of positive squares in only one way, i.e., 12275753616 + 6224263236 = 110796^2 + 78894^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×18500016852³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 513889357 = 18500016852 / (1 + 8 + 5 + 0 + 0 + 0 + 1 + 6 + 8 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500016851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 256944643 + ... + 256944714.

Almost surely, 2^18500016852 is an apocalyptic number.

18500016852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18500016852 is an abundant number, since it is smaller than the sum of its proper divisors (28263914726).

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

18500016852 is a wasteful number, since it uses less digits than its factorization.

18500016852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513889367 (or 513889362 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The spelling of 18500016852 in words is "eighteen billion, five hundred million, sixteen thousand, eight hundred fifty-two".