18278513352 has 64 divisors (see below), whose sum is σ = 55389441600. Its totient is φ = 5538942720.

The previous prime is 18278513311. The next prime is 18278513371. The reversal of 18278513352 is 25331587281.

18278513352 is a `hidden beast` number, since 1 + 82 + 7 + 8 + 513 + 3 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 18278513298 and 18278513307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3844113 + ... + 3848864.

It is an arithmetic number, because the mean of its divisors is an integer number (865460025).

Almost surely, 2^18278513352 is an apocalyptic number.

18278513352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18278513352 is an abundant number, since it is smaller than the sum of its proper divisors (37110928248).

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

18278513352 is a wasteful number, since it uses less digits than its factorization.

18278513352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693003 (or 7692993 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The spelling of 18278513352 in words is "eighteen billion, two hundred seventy-eight million, five hundred thirteen thousand, three hundred fifty-two".