18988135245 has 12 divisors (see below), whose sum is σ = 32912767836. Its totient is φ = 10127005440.

The previous prime is 18988135217. The next prime is 18988135247. The reversal of 18988135245 is 54253188981.

18988135245 is a `hidden beast` number, since 18 + 98 + 8 + 13 + 524 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8168182884 + 10819952361 = 90378^2 + 104019^2 .

It is not a de Polignac number, because 18988135245 - 2⁵ = 18988135213 is a prime.

It is a super-2 number, since 2×18988135245² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18988135191 and 18988135200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18988135247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210979236 + ... + 210979325.

It is an arithmetic number, because the mean of its divisors is an integer number (2742730653).

Almost surely, 2^18988135245 is an apocalyptic number.

18988135245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18988135245 is a deficient number, since it is larger than the sum of its proper divisors (13924632591).

18988135245 is a wasteful number, since it uses less digits than its factorization.

18988135245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421958572 (or 421958569 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The spelling of 18988135245 in words is "eighteen billion, nine hundred eighty-eight million, one hundred thirty-five thousand, two hundred forty-five".