18788822280 has 192 divisors, whose sum is σ = 65716887600. Its totient is φ = 4638228480.

The previous prime is 18788822279. The next prime is 18788822309. The reversal of 18788822280 is 8222888781.

It can be written as a sum of positive squares in 8 ways, for example, as 804403044 + 17984419236 = 28362^2 + 134106^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 348156 + ... + 398484.

Almost surely, 2^18788822280 is an apocalyptic number.

18788822280 is a gapful number since it is divisible by the number (10) 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 18788822280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32858443800).

18788822280 is an abundant number, since it is smaller than the sum of its proper divisors (46928065320).

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

18788822280 is a wasteful number, since it uses less digits than its factorization.

18788822280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50424 (or 50417 counting only the distinct ones).

The product of its (nonzero) digits is 1835008, while the sum is 54.

The spelling of 18788822280 in words is "eighteen billion, seven hundred eighty-eight million, eight hundred twenty-two thousand, two hundred eighty".