19681701 has 16 divisors (see below), whose sum is σ = 29749440. Its totient is φ = 11473920.

The previous prime is 19681693. The next prime is 19681703. The reversal of 19681701 is 10718691.

It is not a de Polignac number, because 19681701 - 2³ = 19681693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19681703) 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 15 ways as a sum of consecutive naturals, for example, 12540 + ... + 14021.

It is an arithmetic number, because the mean of its divisors is an integer number (1859340).

Almost surely, 2^19681701 is an apocalyptic number.

It is an amenable number.

19681701 is a deficient number, since it is larger than the sum of its proper divisors (10067739).

19681701 is a wasteful number, since it uses less digits than its factorization.

19681701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26596.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 19681701 is about 4436.4063159273. The cubic root of 19681701 is about 269.9940602260.

The spelling of 19681701 in words is "nineteen million, six hundred eighty-one thousand, seven hundred one".