19998485056 has 63 divisors (see below), whose sum is σ = 43647306787. Its totient is φ = 9084563840.

The previous prime is 19998485029. The next prime is 19998485077. The reversal of 19998485056 is 65058489991.

The square root of 19998485056 is 141416.

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

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12443805 + ... + 12445411.

Almost surely, 2^19998485056 is an apocalyptic number.

19998485056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19998485056 is the 141416-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19998485056

19998485056 is an abundant number, since it is smaller than the sum of its proper divisors (23648821731).

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

19998485056 is an frugal number, since it uses more digits than its factorization.

19998485056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248 (or 1620 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 64.

Multiplying 19998485056 by its sum of digits (64), we get a square (1279903043584 = 1131328²).

19998485056 divided by its sum of digits (64) gives a square (312476329 = 17677²).

The spelling of 19998485056 in words is "nineteen billion, nine hundred ninety-eight million, four hundred eighty-five thousand, fifty-six".