19315089828 has 36 divisors (see below), whose sum is σ = 48862604700. Its totient is φ = 6433306176.

The previous prime is 19315089823. The next prime is 19315089851. The reversal of 19315089828 is 82898051391.

19315089828 is a `hidden beast` number, since 19 + 31 + 508 + 98 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8021351844 + 11293737984 = 89562^2 + 106272^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (19315089823) 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 11 ways as a sum of consecutive naturals, for example, 164103 + ... + 256046.

It is an arithmetic number, because the mean of its divisors is an integer number (1357294575).

Almost surely, 2^19315089828 is an apocalyptic number.

19315089828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19315089828 is an abundant number, since it is smaller than the sum of its proper divisors (29547514872).

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

19315089828 is a wasteful number, since it uses less digits than its factorization.

19315089828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421436 (or 421431 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 19315089828 in words is "nineteen billion, three hundred fifteen million, eighty-nine thousand, eight hundred twenty-eight".