19975722228 has 384 divisors, whose sum is σ = 69092352000. Its totient is φ = 4831488000.

The previous prime is 19975722227. The next prime is 19975722229. The reversal of 19975722228 is 82222757991.

It is an interprime number because it is at equal distance from previous prime (19975722227) and next prime (19975722229).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19975722223) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 14277873 + ... + 14279271.

It is an arithmetic number, because the mean of its divisors is an integer number (179928000).

Almost surely, 2^19975722228 is an apocalyptic number.

19975722228 is a gapful number since it is divisible by the number (18) 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 19975722228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34546176000).

19975722228 is an abundant number, since it is smaller than the sum of its proper divisors (49116629772).

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

19975722228 is a wasteful number, since it uses less digits than its factorization.

19975722228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 1540 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The spelling of 19975722228 in words is "nineteen billion, nine hundred seventy-five million, seven hundred twenty-two thousand, two hundred twenty-eight".