18898515012 has 48 divisors (see below), whose sum is σ = 48772066112. Its totient is φ = 5657765760.

The previous prime is 18898514959. The next prime is 18898515017. The reversal of 18898515012 is 21051589881.

It is a super-3 number, since 3×18898515012³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18898515017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1631314 + ... + 1642857.

Almost surely, 2^18898515012 is an apocalyptic number.

18898515012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18898515012 is an abundant number, since it is smaller than the sum of its proper divisors (29873551100).

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

18898515012 is a wasteful number, since it uses less digits than its factorization.

18898515012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274228 (or 3274226 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 48.

The spelling of 18898515012 in words is "eighteen billion, eight hundred ninety-eight million, five hundred fifteen thousand, twelve".