18678546432 has 608 divisors, whose sum is σ = 70464172800. Its totient is φ = 4756340736.

The previous prime is 18678546389. The next prime is 18678546437. The reversal of 18678546432 is 23464587681.

It is a happy number.

18678546432 is a `hidden beast` number, since 1 + 8 + 67 + 8 + 546 + 4 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (7741440) is a multiple of the sum of its prime divisors (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18678546437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644087794 + ... + 644087822.

Almost surely, 2^18678546432 is an apocalyptic number.

18678546432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18678546432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35232086400).

18678546432 is an abundant number, since it is smaller than the sum of its proper divisors (51785626368).

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

18678546432 is an frugal number, since it uses more digits than its factorization.

18678546432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 54 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 18678546432 in words is "eighteen billion, six hundred seventy-eight million, five hundred forty-six thousand, four hundred thirty-two".