18063676820 has 24 divisors (see below), whose sum is σ = 43352824704. Its totient is φ = 6193260576.

The previous prime is 18063676769. The next prime is 18063676831. The reversal of 18063676820 is 2867636081.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64512992 + ... + 64513271.

It is an arithmetic number, because the mean of its divisors is an integer number (1806367696).

Almost surely, 2^18063676820 is an apocalyptic number.

18063676820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18063676820 is an abundant number, since it is smaller than the sum of its proper divisors (25289147884).

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

18063676820 is a wasteful number, since it uses less digits than its factorization.

18063676820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129026279 (or 129026277 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 18063676820 in words is "eighteen billion, sixty-three million, six hundred seventy-six thousand, eight hundred twenty".