19840636983 has 8 divisors (see below), whose sum is σ = 26479648000. Its totient is φ = 13214358648.

The previous prime is 19840636943. The next prime is 19840636987. The reversal of 19840636983 is 38963604891.

It is a happy number.

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

It is not a de Polignac number, because 19840636983 - 2⁸ = 19840636727 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 (19840636987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3179533 + ... + 3185766.

It is an arithmetic number, because the mean of its divisors is an integer number (3309956000).

Almost surely, 2^19840636983 is an apocalyptic number.

19840636983 is a deficient number, since it is larger than the sum of its proper divisors (6639011017).

19840636983 is a wasteful number, since it uses less digits than its factorization.

19840636983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6366341.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 19840636983 in words is "nineteen billion, eight hundred forty million, six hundred thirty-six thousand, nine hundred eighty-three".