19701193680 has 320 divisors, whose sum is σ = 77915013120. Its totient is φ = 4482169344.

The previous prime is 19701193669. The next prime is 19701193709. The reversal of 19701193680 is 8639110791.

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 63 ways as a sum of consecutive naturals, for example, 3368839 + ... + 3374681.

It is an arithmetic number, because the mean of its divisors is an integer number (243484416).

Almost surely, 2^19701193680 is an apocalyptic number.

19701193680 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 19701193680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38957506560).

19701193680 is an abundant number, since it is smaller than the sum of its proper divisors (58213819440).

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

19701193680 is a wasteful number, since it uses less digits than its factorization.

19701193680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6095 (or 6083 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 19701193680 in words is "nineteen billion, seven hundred one million, one hundred ninety-three thousand, six hundred eighty".