18123539352 has 32 divisors (see below), whose sum is σ = 45709818480. Its totient is φ = 5987717120.

The previous prime is 18123539351. The next prime is 18123539363. The reversal of 18123539352 is 25393532181.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18123539351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3338649 + ... + 3344072.

Almost surely, 2^18123539352 is an apocalyptic number.

18123539352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18123539352 is an abundant number, since it is smaller than the sum of its proper divisors (27586279128).

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

18123539352 is a wasteful number, since it uses less digits than its factorization.

18123539352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6682843 (or 6682839 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The spelling of 18123539352 in words is "eighteen billion, one hundred twenty-three million, five hundred thirty-nine thousand, three hundred fifty-two".