19758148420 has 24 divisors (see below), whose sum is σ = 41501608344. Its totient is φ = 7901450496.

The previous prime is 19758148381. The next prime is 19758148429. The reversal of 19758148420 is 2484185791.

It can be written as a sum of positive squares in 4 ways, for example, as 608016964 + 19150131456 = 24658^2 + 138384^2 .

It is not an unprimeable number, because it can be changed into a prime (19758148429) 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 7 ways as a sum of consecutive naturals, for example, 21687 + ... + 199966.

It is an arithmetic number, because the mean of its divisors is an integer number (1729233681).

Almost surely, 2^19758148420 is an apocalyptic number.

19758148420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19758148420 is an abundant number, since it is smaller than the sum of its proper divisors (21743459924).

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

19758148420 is a wasteful number, since it uses less digits than its factorization.

19758148420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226119 (or 226117 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 19758148420 in words is "nineteen billion, seven hundred fifty-eight million, one hundred forty-eight thousand, four hundred twenty".