18829987776 has 84 divisors (see below), whose sum is σ = 54210901992. Its totient is φ = 6248968704.

The previous prime is 18829987751. The next prime is 18829987789. The reversal of 18829987776 is 67778992881.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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, 58746 + ... + 202758.

Almost surely, 2^18829987776 is an apocalyptic number.

18829987776 is a gapful number since it is divisible by the number (16) 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 18829987776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27105450996).

18829987776 is an abundant number, since it is smaller than the sum of its proper divisors (35380914216).

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

18829987776 is a wasteful number, since it uses less digits than its factorization.

18829987776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144258 (or 144245 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 72.

The spelling of 18829987776 in words is "eighteen billion, eight hundred twenty-nine million, nine hundred eighty-seven thousand, seven hundred seventy-six".