19670791680 has 480 divisors, whose sum is σ = 71566919424. Its totient is φ = 5177696256.

The previous prime is 19670791661. The next prime is 19670791697. The reversal of 19670791680 is 8619707691.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64074087 + ... + 64074393.

Almost surely, 2^19670791680 is an apocalyptic number.

19670791680 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 19670791680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35783459712).

19670791680 is an abundant number, since it is smaller than the sum of its proper divisors (51896127744).

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

19670791680 is an equidigital number, since it uses as much as digits as its factorization.

19670791680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The spelling of 19670791680 in words is "nineteen billion, six hundred seventy million, seven hundred ninety-one thousand, six hundred eighty".