19393766340 has 48 divisors (see below), whose sum is σ = 58479667008. Its totient is φ = 4773849984.

The previous prime is 19393766323. The next prime is 19393766341. The reversal of 19393766340 is 4366739391.

It is a super-2 number, since 2×19393766340² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19393766341) 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 15 ways as a sum of consecutive naturals, for example, 12431122 + ... + 12432681.

It is an arithmetic number, because the mean of its divisors is an integer number (1218326396).

Almost surely, 2^19393766340 is an apocalyptic number.

19393766340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19393766340 is an abundant number, since it is smaller than the sum of its proper divisors (39085900668).

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

19393766340 is a wasteful number, since it uses less digits than its factorization.

19393766340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24863828 (or 24863826 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 51.

The spelling of 19393766340 in words is "nineteen billion, three hundred ninety-three million, seven hundred sixty-six thousand, three hundred forty".