19485994220 has 192 divisors, whose sum is σ = 53496446976. Its totient is φ = 5781093120.

The previous prime is 19485994219. The next prime is 19485994267. The reversal of 19485994220 is 2249958491.

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 63 ways as a sum of consecutive naturals, for example, 7897427 + ... + 7899893.

It is an arithmetic number, because the mean of its divisors is an integer number (278627328).

Almost surely, 2^19485994220 is an apocalyptic number.

19485994220 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 19485994220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26748223488).

19485994220 is an abundant number, since it is smaller than the sum of its proper divisors (34010452756).

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

19485994220 is a wasteful number, since it uses less digits than its factorization.

19485994220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2738 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 19485994220 in words is "nineteen billion, four hundred eighty-five million, nine hundred ninety-four thousand, two hundred twenty".