19736980 has 12 divisors (see below), whose sum is σ = 41447700. Its totient is φ = 7894784.

The previous prime is 19736939. The next prime is 19736989. The reversal of 19736980 is 8963791.

It can be written as a sum of positive squares in 2 ways, for example, as 4511376 + 15225604 = 2124^2 + 3902^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19736989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493405 + ... + 493444.

It is an arithmetic number, because the mean of its divisors is an integer number (3453975).

Almost surely, 2^19736980 is an apocalyptic number.

19736980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19736980 is an abundant number, since it is smaller than the sum of its proper divisors (21710720).

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

19736980 is a wasteful number, since it uses less digits than its factorization.

19736980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986858 (or 986856 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 19736980 is about 4442.6321027067. The cubic root of 19736980 is about 270.2465968400.

The spelling of 19736980 in words is "nineteen million, seven hundred thirty-six thousand, nine hundred eighty".