19650686131983 has 16 divisors (see below), whose sum is σ = 26226443980800. Its totient is φ = 13087699065504.

The previous prime is 19650686131913. The next prime is 19650686132041. The reversal of 19650686131983 is 38913168605691.

It is a de Polignac number, because none of the positive numbers 2^k-19650686131983 is a prime.

It is a super-2 number, since 2×19650686131983² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19650686131903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11909818 + ... + 13459016.

It is an arithmetic number, because the mean of its divisors is an integer number (1639152748800).

Almost surely, 2^{19650686131983} is an apocalyptic number.

19650686131983 is a deficient number, since it is larger than the sum of its proper divisors (6575757848817).

19650686131983 is a wasteful number, since it uses less digits than its factorization.

19650686131983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553318.

The product of its (nonzero) digits is 50388480, while the sum is 66.

The spelling of 19650686131983 in words is "nineteen trillion, six hundred fifty billion, six hundred eighty-six million, one hundred thirty-one thousand, nine hundred eighty-three".