18789190622500 has 45 divisors (see below), whose sum is σ = 41088676009381. Its totient is φ = 7515589556000.

The previous prime is 18789190622473. The next prime is 18789190622509. The reversal of 18789190622500 is 522609198781.

The square root of 18789190622500 is 4334650.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 12524421908196 + 6264768714304 = 3538986^2 + 2502952^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18789190622509) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 216689154 + ... + 216775846.

Almost surely, 2^{18789190622500} is an apocalyptic number.

18789190622500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18789190622500 is the 4334650-th square number.

It is an amenable number.

18789190622500 is an abundant number, since it is smaller than the sum of its proper divisors (22299485386881).

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

18789190622500 is an frugal number, since it uses more digits than its factorization.

18789190622500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173410 (or 86700 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 58.

The spelling of 18789190622500 in words is "eighteen trillion, seven hundred eighty-nine billion, one hundred ninety million, six hundred twenty-two thousand, five hundred".