18969552900 has 81 divisors (see below), whose sum is σ = 59471963733. Its totient is φ = 5057445600.

The previous prime is 18969552859. The next prime is 18969552911. The reversal of 18969552900 is 925596981.

The square root of 18969552900 is 137730.

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

18969552900 is a `hidden beast` number, since 1 + 89 + 6 + 9 + 552 + 9 + 0 + 0 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6829039044 + 12140513856 = 82638^2 + 110184^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4129605 + ... + 4134195.

Almost surely, 2^18969552900 is an apocalyptic number.

18969552900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18969552900 is the 137730-th square number.

It is an amenable number.

18969552900 is an abundant number, since it is smaller than the sum of its proper divisors (40502410833).

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

18969552900 is an equidigital number, since it uses as much as digits as its factorization.

18969552900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9202 (or 4601 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 18969552900 in words is "eighteen billion, nine hundred sixty-nine million, five hundred fifty-two thousand, nine hundred".