19709264340 has 144 divisors (see below), whose sum is σ = 61479145728. Its totient is φ = 5107214592.

The previous prime is 19709264321. The next prime is 19709264359. The reversal of 19709264340 is 4346290791.

It is a happy number.

19709264340 is a `hidden beast` number, since 197 + 0 + 9 + 26 + 434 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (19709264321) and next prime (19709264359).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7344639 + ... + 7347321.

It is an arithmetic number, because the mean of its divisors is an integer number (426938512).

Almost surely, 2^19709264340 is an apocalyptic number.

19709264340 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 19709264340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30739572864).

19709264340 is an abundant number, since it is smaller than the sum of its proper divisors (41769881388).

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

19709264340 is a wasteful number, since it uses less digits than its factorization.

19709264340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838 (or 3833 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 19709264340 in words is "nineteen billion, seven hundred nine million, two hundred sixty-four thousand, three hundred forty".