18071838252 has 36 divisors (see below), whose sum is σ = 49195560960. Its totient is φ = 5560565472.

The previous prime is 18071838241. The next prime is 18071838269. The reversal of 18071838252 is 25283817081.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 18071838198 and 18071838207.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19307052 + ... + 19307987.

It is an arithmetic number, because the mean of its divisors is an integer number (1366543360).

Almost surely, 2^18071838252 is an apocalyptic number.

18071838252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18071838252 is an abundant number, since it is smaller than the sum of its proper divisors (31123722708).

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

18071838252 is a wasteful number, since it uses less digits than its factorization.

18071838252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38615062 (or 38615057 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 18071838252 in words is "eighteen billion, seventy-one million, eight hundred thirty-eight thousand, two hundred fifty-two".