19701983 has 4 divisors (see below), whose sum is σ = 22516560. Its totient is φ = 16887408.

The previous prime is 19701947. The next prime is 19702009. The reversal of 19701983 is 38910791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38910791 = 37 ⋅1051643.

It is a cyclic number.

It is not a de Polignac number, because 19701983 - 2¹⁴ = 19685599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19701923) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1407278 + ... + 1407291.

It is an arithmetic number, because the mean of its divisors is an integer number (5629140).

Almost surely, 2^19701983 is an apocalyptic number.

19701983 is a deficient number, since it is larger than the sum of its proper divisors (2814577).

19701983 is an equidigital number, since it uses as much as digits as its factorization.

19701983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814576.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 19701983 is about 4438.6915864926. The cubic root of 19701983 is about 270.0867713792.

The spelling of 19701983 in words is "nineteen million, seven hundred one thousand, nine hundred eighty-three".