19680771 has 12 divisors (see below), whose sum is σ = 28843976. Its totient is φ = 11927520.

The previous prime is 19680769. The next prime is 19680823. The reversal of 19680771 is 17708691.

It is not a de Polignac number, because 19680771 - 2¹ = 19680769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19680721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26746 + ... + 27471.

Almost surely, 2^19680771 is an apocalyptic number.

19680771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19680771 is a deficient number, since it is larger than the sum of its proper divisors (9163205).

19680771 is a wasteful number, since it uses less digits than its factorization.

19680771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54242 (or 54231 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 19680771 is about 4436.3015001237. The cubic root of 19680771 is about 269.9898075713.

It can be divided in two parts, 196807 and 71, that added together give a triangular number (196878 = T₆₂₇).

The spelling of 19680771 in words is "nineteen million, six hundred eighty thousand, seven hundred seventy-one".