19501982 has 8 divisors (see below), whose sum is σ = 29302536. Its totient is φ = 9734472.

The previous prime is 19501967. The next prime is 19501987. The reversal of 19501982 is 28910591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19501987) 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, 6728 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (3662817).

Almost surely, 2^19501982 is an apocalyptic number.

19501982 is a deficient number, since it is larger than the sum of its proper divisors (9800554).

19501982 is a wasteful number, since it uses less digits than its factorization.

19501982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16522.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 19501982 is about 4416.1048447699. The cubic root of 19501982 is about 269.1697495496.

The spelling of 19501982 in words is "nineteen million, five hundred one thousand, nine hundred eighty-two".