18613733652 has 18 divisors (see below), whose sum is σ = 47051382378. Its totient is φ = 6204577872.

The previous prime is 18613733639. The next prime is 18613733657. The reversal of 18613733652 is 25633731681.

18613733652 is a `hidden beast` number, since 186 + 137 + 336 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16196634756 + 2417098896 = 127266^2 + 49164^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18613733598 and 18613733607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18613733657) 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, 258524043 + ... + 258524114.

Almost surely, 2^18613733652 is an apocalyptic number.

18613733652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18613733652 is an abundant number, since it is smaller than the sum of its proper divisors (28437648726).

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

18613733652 is a wasteful number, since it uses less digits than its factorization.

18613733652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517048167 (or 517048162 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 18613733652 in words is "eighteen billion, six hundred thirteen million, seven hundred thirty-three thousand, six hundred fifty-two".